Add remote-file-name-inhibit-locks

* doc/emacs/files.texi (Interlocking):
* doc/lispref/files.texi (File Locks):
* doc/misc/tramp.texi (Auto-save File Lock and Backup):
Add remote-file-name-inhibit-locks.

* etc/NEWS: New user option 'remote-file-name-inhibit-locks'.

* lisp/files.el (remote-file-name-inhibit-locks): New defcustom.

* lisp/net/tramp-adb.el (tramp-adb-file-name-handler-alist):
* lisp/net/tramp-crypt.el (tramp-crypt-file-name-handler-alist):
* lisp/net/tramp-gvfs.el (tramp-gvfs-file-name-handler-alist):
* lisp/net/tramp-rclone.el (tramp-rclone-file-name-handler-alist):
* lisp/net/tramp-sh.el (tramp-sh-file-name-handler-alist):
* lisp/net/tramp-smb.el (tramp-smb-file-name-handler-alist):
* lisp/net/tramp-sshfs.el (tramp-sshfs-file-name-handler-alist):
* lisp/net/tramp-sudoedit.el (tramp-sudoedit-file-name-handler-alist):
Use `tramp-handle-make-lock-file-name'.

* lisp/net/tramp.el (tramp-allow-unsafe-temporary-files): Fix docstring.
(tramp-handle-make-lock-file-name): New defun.

* test/lisp/net/tramp-tests.el (tramp-test39-lock-file): Extend test.

Block TLS handshake until TCP connection established

If a TLS handshake is attempted before the completion of an
asynchronous TCP connection has been ascertained, our local state will
not be set up correctly for further progress and the sentinel "open"
event will never be sent.  This can occur if sufficient time passes
after the initiation of an async TCP connection so that by the time
`wait_reading_process_output` is called, the connection has already
been established on the TCP level.

This somewhat timing-sensitive bug has plagued HTTPS connections on
some platforms, notably macOS, for a long time (bug#49449).

* src/process.c (wait_reading_process_output): Gate the TLS handshake
by the NON_BLOCKING_CONNECT_FD flag.  The flag will be cleared as soon
as the TCP socket is found to be writable.
* test/src/process-tests.el (process-async-https-with-delay):
New test.

Fix portability issue with make-serial-process

* src/sysdep.c (struct speed_struct): New struct.
(speeds): New static array of struct speed_struct.
(convert_speed): New static function to convert a numerical baud
rate (e.g., 9600) to a Bnnn constant defined in termios.h (e.g.,
B9600).
(serial_configure): Use convert_speed to make the call to cfsetspeed
compliant with its advertised API.  (Bug#49524)

; * doc/lispref/intro.texi (Caveats): Fix paren.

Fix a problem with tramp-*-process-file

* lisp/net/tramp-adb.el (tramp-adb-handle-process-file):
* lisp/net/tramp-sh.el (tramp-sh-handle-process-file):
* lisp/net/tramp-smb.el (tramp-smb-handle-process-file):
* lisp/net/tramp-sshfs.el (tramp-sshfs-handle-process-file):
Use `(expand-file-name default-directory)'.

Port test module to glibc 2.33

* test/Makefile.in (REPLACE_FREE, FREE_SOURCE_0, FREE_SOURCE_1):
New macros.
($(test_module)): Improve accuracy of test as to whether free.c
should be compiled; glibc 2.33 does not need it compiled and the
compilation breaks if you try, if you build with
--enable-gcc-warnings.

Pacify gcc 11.1.1 -Wclobbered

* src/eval.c (Fprogn, internal_lisp_condition_case):
Add CACHEABLE to work around more instances of -Wclobbered bug.

Pacify gcc 11.1.1 -Wanalyzer-possible-null-dereference

* oldXMenu/Create.c (XMenuCreate):
* oldXMenu/Internal.c (_XMRecomputePane, _XMRecomputeSelection):
* oldXMenu/XMakeAssoc.c (XMakeAssoc):
* test/src/emacs-module-resources/mod-test.c (Fmod_test_userptr_make):
Don’t assume that malloc and calloc succeed.

Pacify gcc 11.1.1 -Wanalyzer-null-argument

* lib-src/etags.c (regexp): Omit member force_explicit_name,
since it’s always true.  All uses removed.  This lets us
remove calls to strlen (name) where GCC isn’t smart enough
to deduce that name must be nonnull.
* lib-src/movemail.c (main): Fix bug that could cause
link (tempname, NULL) to be called.
* src/emacs.c (argmatch): Break check into two ‘if’s,
since GCC doesn’t seem to be smart enough to check the single ‘if’.
* src/gtkutil.c (xg_update_menu_item): Fix bug where strcmp
could be given a NULL arg.
* src/xfont.c (xfont_list_family): Use nonnull value for dummy
initial value.

Pacify gcc -Woverflow more nicely

* src/alloc.c (mark_maybe_pointer): Simplify pacification
of gcc -Woverflow (unknown GCC version).

* lisp/textmodes/enriched.el: Require 'facemenu' (bug#49466)

Further tweaks to gnus-search-query-expand-key

* lisp/gnus/gnus-search.el (gnus-search-query-expand-key): It's
possible that KEY could be partially completed (ie no longer string=
to COMP), but not all the way. Use a more accurate test. Add
docstring.

Use `auto-save-file-name-p' in tramp-*-write-region

* lisp/net/tramp.el (tramp-handle-write-region):
* lisp/net/tramp-adb.el (tramp-adb-handle-write-region):
* lisp/net/tramp-sh.el (tramp-sh-handle-write-region):
* lisp/net/tramp-smb.el (tramp-smb-handle-write-region):
* lisp/net/tramp-sshfs.el (tramp-sshfs-handle-write-region):
Use `auto-save-file-name-p'.

Fix compilation of the --with-wide-int configuration

* src/alloc.c (mark_maybe_pointer): Fix a recent change for
WIDE_EMACS_INT builds.  (Bug#49261)

; Fix misspellings of 'occurrence' in docs.

; * doc/lispref/text.texi (Substitution): Fix a recent change.

Pacify GCC 11.1.1 20210531 (Red Hat 11.1.1-3)

* src/image.c (xpm_load_image):
* src/xfns.c (x_icon):
Rework to pacify gcc -Wmaybe-uninitialized.

Make pdumper-marking pickier

Prevent some false-positives in conservative GC marking.
This doesn’t fix any correctness bugs; it’s merely to
reclaim some memory instead of keeping it unnecessarily.
* src/alloc.c (mark_maybe_pointer): New arg SYMBOL_ONLY.
All callers changed.  Check that the pointer’s tag, if any,
matches the pdumper-reported type.

Fix pdumper-related GC bug

* src/alloc.c (mark_maybe_pointer): Also mark pointers
to pdumper objects, even when the pointers are tagged.
Add a FIXME saying why this isn’t enough.

Rewrite gnus-search-query-expand-key

* lisp/gnus/gnus-search.el (gnus-search-query-expand-key): There was a
misunderstanding about how completion-all-completion works (if the
test string can't be completed, the whole table is returned). Simplify
to use try-completion.
* test/lisp/gnus/gnus-search-tests.el (gnus-s-expand-keyword): Ensure
that an unknown/uncompletable keyword is returned unmolested.

Rework gnus-search-indexed-parse-output

* lisp/gnus/gnus-search.el (gnus-search-indexed-parse-output): Be more
careful about matching filesystem paths to Gnus group names; make
absolutely sure that we only return valid article numbers.

* src/buffer.c (kill-buffer): Fix a typo.

* src/buffer.c (Fkill_buffer): Fix typo in comment.

doc/lispref/text.texi (Substitution): Add subst-char-in-string

* doc/lispref/text.texi (Substitution): Document
subst-char-in-string (bug#49420).

Make package-menu-filter-by-status work as documented

* lisp/emacs-lisp/package.el (package-menu-filter-by-status): Work
as documented (bug#49474).

Skip a process test on Cygwin to avoid hang

* test/src/process-tests.el
(process-tests/fd-setsize-no-crash/make-network-process): Skip
test on Cygwin to avoid hang due to connect/accept handshake.
(Bug#49496)

* lisp/facemenu.el: Preload the C-mouse-2 menu binding

Further cleanup for file locks

* doc/misc/tramp.texi (Top, Configuration): Adapt node name for
file locks.
(Auto-save File Lock and Backup): Rename node name and section
title.  Add file-lock to @cindex.  Describe file locks.

* lisp/dired.el (dired-trivial-filenames): Add lock files.
(dired-font-lock-keywords): Move files suffixed with
`completion-ignored-extensions' up.  Add lock files to these checks.

* lisp/net/tramp.el (tramp-get-lock-file, tramp-handle-unlock-file):
Use `when-let'
(tramp-lock-file-info-regexp): Rename from
`tramp-lock-file-contents-regexp'.
(tramp-handle-file-locked-p, tramp-handle-lock-file): Adapt callees.
(tramp-handle-lock-file): Set file modes of lockname.

* src/buffer.c (Frestore_buffer_modified_p):
* src/fileio.c (write_region):
* src/insdel.c (prepare_to_modify_buffer_1): Call Flock_file.

* src/filelock.c (Qmake_lock_file_name): Declare symbol.
(make_lock_file_name): Use it.  Don't check Fboundp, it doesn't
work for interned symbols.
(lock_file): Return a Lisp_Object.  Don't check create_lockfiles.
Remove MSDOS version of the function.
(Flock_file): Check create_lockfiles.
(Flock_buffer): Call Flock_file.

* src/lisp.h (lock_file): Remove.

* test/lisp/shadowfile-tests.el (shadow-test08-shadow-todo)
(shadow-test09-shadow-copy-files): Let-bind `create-lockfiles'.

* test/lisp/net/tramp-tests.el (create-lockfiles): Don't set it
globally.
(tramp-test39-lock-file): Check also for `set-visited-file-name'.

Partially restore the lost C-mouse-2 drop-down menu

This allows to pop up the Text Properties menu once facemenu is
loaded.  It still doesn't allow C-mouse-2 clicks without manually
loading facemenu; FIXME.
* lisp/facemenu.el (global-map) <C-down-mouse-2>: Add back the
removed binding.  (Bug#49466)

* lisp/outline.el (outline-mode-cycle-map): Don't bind `tab`.

Since it would take precedence over bindings for TAB in higher
precedence maps.

* doc/lispref/files.texi (Magic File Names): Add make-lock-file-name.

Code cleanup wrt file locks

* lisp/files.el (make-lock-file-name): Fix docstring.

* lisp/net/tramp-adb.el (tramp-adb-file-name-handler-alist):
* lisp/net/tramp-archive.el (tramp-archive-file-name-handler-alist):
* lisp/net/tramp-crypt.el (tramp-crypt-file-name-handler-alist):
* lisp/net/tramp-gvfs.el (tramp-gvfs-file-name-handler-alist):
* lisp/net/tramp-rclone.el (tramp-rclone-file-name-handler-alist):
* lisp/net/tramp-sh.el (tramp-sh-file-name-handler-alist):
* lisp/net/tramp-smb.el (tramp-smb-file-name-handler-alist):
* lisp/net/tramp-sshfs.el (tramp-sshfs-file-name-handler-alist):
* lisp/net/tramp-sudoedit.el (tramp-sudoedit-file-name-handler-alist):
Add `make-lock-file-name'.

* lisp/net/tramp.el (tramp-file-name-for-operation):
Add `make-lock-file-name'.
(tramp-handle-unlock-file): Call `userlock--handle-unlock-error'
in case of error.

* src/buffer.c (Frestore_buffer_modified_p):
* src/editfns.c (Freplace_buffer_contents):
* src/fileio.c (Finsert_file_contents, write_region): Call Funlock_file.

* src/filelock.c (unlock_file): Rename from unlock_file_body.
Remove the other declarations of unlock_file.  Move file name
handler check to ...
(Funlock_file): ... here.  Adapt argument numbers.  Call
unlock_file wrapped by internal_condition_case.
(Flock_file): Adapt argument numbers.
(unlock_all_files, Funlock_buffer, unlock_buffer): Call Funlock_file.

* src/lisp.h (unlock_file): Remove.

Don't turn mouse-1 into mouse-2 when clicking on the tab-line (bug#49247)

* lisp/tab-line.el (tab-line-tab-name-format-default): For 'tab-line-tab-map'
add the property 'follow-link' with the value 'ignore'.

Use display-buffer with re-builder (bug#49069)

* lisp/emacs-lisp/re-builder.el (re-builder): Uses 'display-buffer'
with 'display-buffer-in-direction' to display the reb-buffer.  This
allow user-customizations and using it on not splitables windows.
Add a dedication to its window so killing this buffer quit the window.

Make desktop-kill more robust

* lisp/desktop.el (desktop-kill): Allow exiting Emacs even if we
can't delete the desktop file (bug#20762).

Allow inhibiting inserting #! in sh-set-shell

* lisp/progmodes/sh-script.el (sh-set-shell): Allow inhibiting
inserting the #! line (bug#20959).

Avoid making backup files in ediff when `make-backup-files' is nil

* lisp/vc/ediff-util.el (ediff-arrange-autosave-in-merge-jobs):
Don't make backup files when `make-backup-files' is nil (bug#21599).

Make ido-mode override ffap-file-finder

* lisp/ffap.el: Autoload so that we can override in ido (bug#21980).

* lisp/ido.el (ido-everywhere): Override ffap-file-finder.

Some further adaptions wrt Tramp file name locks

* lisp/files.el (files--transform-file-name): Rename from
`auto-save--transform-file-name'.  Wrap with `save-match-data'.
(make-auto-save-file-name): Use it.
(make-lock-file-name): Use it.  Call file name handler.

* lisp/net/tramp.el (tramp-handle-write-region):
* lisp/net/tramp-adb.el (tramp-adb-handle-write-region):
* lisp/net/tramp-sh.el (tramp-sh-handle-write-region):
* lisp/net/tramp-smb.el (tramp-smb-handle-write-region):
Suppress file lock for temporary file.

* lisp/net/tramp-compat.el (tramp-compat-make-lock-file-name):
New defalias.

* lisp/net/tramp.el (tramp-get-lock-file)
(tramp-handle-lock-file, tramp-handle-unlock-file): Use it.
(tramp-make-lock-name): Remove.

* test/lisp/filenotify-tests.el (file-notify-test03-events-remote):
Tag it :unstable temporarily.

Exclude term-mode from hi-lock global modes

* lisp/hi-lock.el (hi-lock-exclude-modes): Exclude term-mode so
that `C-x' works in terminal buffers (bug#22620).

Fix font-lock of Makefile variables at the start of lines

* lisp/progmodes/make-mode.el (makefile-var-use-regex): Match
variables at the beginning of lines correctly (bug#23266).  Change
suggested by Anders Lindgren <andlind@gmail.com>.

Mention what happens with timers when the computer is asleep

* doc/lispref/os.texi (Timers): Explain what happens if the
computer is a asleep when the timer is scheduled (bug#23929).

Make make_lock_file_name more robust

* src/filelock.c (make_lock_file_name): Protect against the
make-lock-file-name not being defined.
(lock_file, unlock_file_body, Ffile_locked_p): Return early if not
defined.

* lisp/faces.el: Fix a typo.

Fix last change

* lisp/faces.el (tty-menu-enabled-face, tty-menu-disabled-face):
Define for monochrome displays.

Add new user option lock-file-name-transforms

* doc/emacs/files.texi (Interlocking): Mention
lock-file-name-transforms.

* doc/lispref/files.texi (File Locks): Document
lock-file-name-transforms.

* doc/misc/efaq.texi (Not writing files to the current directory):
Mention all the three variables needed to not having Emacs writing
files to the current directory in one place.

* lisp/files.el (lock-file-name-transforms): New user option (bug#49261).
(make-auto-save-file-name): Factor out the main logic...
(auto-save--transform-file-name): ... to this new function.
(make-lock-file-name): New function that also calls the
factored-out function.

* src/filelock.c: Remove MAKE_LOCK_NAME and fill_in_lock_file_name.
(make_lock_file_name): New utility function that calls out to Lisp
to heed `lock-file-name-transforms'.
(lock_file): Use it.  Also remove likely buggy call to
dostounix_filename.
(unlock_file_body, Ffile_locked_p): Also use make_lock_file_name.

Fix tty menus on monochrome displays

* lisp/faces.el (tty-menu-selected-face): Make sure the selected
menu item stands out even without colors.

Implement file locks for remote files (Bug#49261)

* doc/lispref/files.texi (Magic File Names): Add file-locked-p,
lock-file and unlock-file.

* etc/NEWS: Tramp supports file locks now.

* lisp/net/tramp-adb.el (tramp-adb-file-name-handler-alist):
Add `file-locked-p', `lock-file' and `unlock-file'.
(tramp-adb-handle-write-region): Handle LOCKNAME.

* lisp/net/tramp-archive.el (tramp-archive-file-name-handler-alist):
Add `file-locked-p', `lock-file' and `unlock-file'.

* lisp/net/tramp-crypt.el (tramp-crypt-file-name-handler-alist):
Add `file-locked-p', `lock-file' and `unlock-file'.
(tramp-crypt-handle-file-locked-p, tramp-crypt-handle-lock-file)
(tramp-crypt-handle-unlock-file): New defun.

* lisp/net/tramp-fuse.el (tramp-fuse-mounted-p): Simplify.
(tramp-fuse-unmount): New defun.

* lisp/net/tramp-gvfs.el (tramp-gvfs-file-name-handler-alist):
Add `file-locked-p', `lock-file' and `unlock-file'.
(tramp-gvfs-maybe-open-connection): Set "lock-pid" connection property.

* lisp/net/tramp-rclone.el (tramp-rclone-file-name-handler-alist):
Add `file-locked-p', `lock-file' and `unlock-file'.
(tramp-rclone-maybe-open-connection): Set "lock-pid" connection property.

* lisp/net/tramp-sh.el (tramp-sh-file-name-handler-alist):
Add `file-locked-p', `lock-file' and `unlock-file'.
(tramp-sh-handle-write-region): Handle LOCKNAME.

* lisp/net/tramp-smb.el (tramp-smb-file-name-handler-alist):
Add `file-locked-p', `lock-file' and `unlock-file'.
(tramp-smb-handle-copy-directory): Use `sleep-for'.
(tramp-smb-handle-write-region): Handle LOCKNAME.

* lisp/net/tramp-sshfs.el (tramp-sshfs-file-name-handler-alist):
Add `file-locked-p', `lock-file' and `unlock-file'.
(tramp-sshfs-handle-write-region): Handle LOCKNAME.
(tramp-sshfs-maybe-open-connection): Set "lock-pid" connection property.

* lisp/net/tramp-sudoedit.el (tramp-sudoedit-file-name-handler-alist):
Add `file-locked-p', `lock-file' and `unlock-file'.
(tramp-sudoedit-maybe-open-connection):
Set "lock-pid" connection property.

* lisp/net/tramp.el (tramp-file-name-for-operation):
Add `file-locked-p', `lock-file' and `unlock-file'.
(tramp-make-lock-name, tramp-get-lock-file, tramp-get-lock-pid)
(tramp-handle-file-locked-p, tramp-handle-lock-file)
(tramp-handle-unlock-file): New defuns.
(tramp-lock-file-contents-regexp): New regexp.
(tramp-handle-write-region): Handle LOCKNAME.

* src/filelock.c (lock_file, unlock_file_body, Ffile_locked_p):
Call handler if exists.
(Flock_file, Funlock_file): New defuns.
(Qlock_file, Qunlock_file, Qfile_locked_p): Declare symbols.
(Slock_file, Sunlock_file): Declare subroutines.

* test/lisp/net/tramp-archive-tests.el
(tramp-archive-test40-make-nearby-temp-file)
(tramp-archive-test43-file-system-info): Rename.

* test/lisp/net/tramp-tests.el (top): Set `create-lockfiles' to nil.
(tramp--test-fuse-p): New defun.
(tramp-test14-delete-directory): Use it.
(tramp-test39-lock-file): New test.
(tramp-test40-make-nearby-temp-file)
(tramp-test41-special-characters)
(tramp-test41-special-characters-with-stat)
(tramp-test41-special-characters-with-perl)
(tramp-test41-special-characters-with-ls, tramp-test42-utf8)
(tramp-test42-utf8-with-stat, tramp-test42-utf8-with-perl)
(tramp-test42-utf8-with-ls, tramp-test43-file-system-info)
(tramp-test44-asynchronous-requests, tramp-test45-auto-load)
(tramp-test45-delay-load, tramp-test45-recursive-load)
(tramp-test45-remote-load-path, tramp-test46-unload): Rename.
(tramp--test-special-characters, tramp--test-utf8)
(tramp--test-asynchronous-requests-timeout): Modify docstring.

Merge from origin/emacs-27

fbf1cb2bf2 (origin/emacs-27) Fix overfull hbox in Emacs manual
fda60094a2 Minor copyedits of Emacs manual

# Conflicts:
# doc/emacs/display.texi

Make previous empty-body warning disabling more robust

* lisp/emacs-lisp/macroexp.el (macroexp--expand-all):
`byte-compile-warning-enabled-p' may not be defined here.

Avoid invalid regexp in wide docstring check

* lisp/emacs-lisp/bytecomp.el (byte-compile--wide-docstring-p):
Avoid constructing an invalid regexp during byte-compilation by
limiting the number of columns to the current RE_DUP_MAX of 65535.
This protects against pathological values of fill-column, for
example (bug#49426).

* lisp/repeat.el (describe-repeat-maps): Rename from `describe-repeat'.

Fix text strings (bug#49265).

Make `M-x clipboard-yank' work reliably

* lisp/menu-bar.el (clipboard-yank): Make the command work
consistently (bug#27442).

* lisp/select.el (gui-selection-value): Try to explain why the
logic is the way it is.

Explain what ( . c) means to the Emacs Lisp reader

* doc/lispref/objects.texi (Dotted Pair Notation): Explain what
( . c) means to the Lisp reader (bug#24875).

Fix right-margin display on TTY frames

* src/dispnew.c (prepare_desired_row, adjust_glyph_matrix): Adjust
the glyph pointer of the right-margin area for all windows but the
rightmost ones on TTY frames, to account for the border glyph.
(Bug#48257)

Warn when wrapping index matches with `,' after `i' in Info

* lisp/info.el (Info--current-index-alternative): New internal
variable.
(Info-warn-on-index-alternatives-wrap): New user option (bug#24282).
(Info-index-next): Use the new user option.

Add faces for shr heading elements (bug#49433)

* etc/NEWS: Document new faces.
* lisp/net/shr.el (shr-h1, shr-h2, shr-h3, shr-h4, shr-h5, shr-h6):
Define new faces.
(shr-tag-h1): Remove inclusion of 'variable-pitch' face.  Fix
bug#49433 by applying a new face directly.
(shr-tag-h2, shr-tag-h3, shr-tag-h4, shr-tag-h5, shr-tag-h6): Apply
new faces.

Make gnus-gcc-externalize-attachments work again

* lisp/gnus/gnus-msg.el (gnus-inews-do-gcc): Allow externalizing
parts again by defeating the cache (bug#49436).

Allow inhibiting warnings about unused variables and empty bodies

* lisp/emacs-lisp/cconv.el (cconv--warn-unused-msg): Allow
inhibiting warnings about unbound variables (bug#26486).

* lisp/emacs-lisp/macroexp.el (macroexp--expand-all): Allow
inhibiting warnings about empty bodies.

Allow using `mm-inline-message' from other mail clients than Gnus

* lisp/gnus/mm-view.el (mm-inline-message-prepare-function): New
variable (bug#49380).
(mm-inline-message): Use it to separate out the Gnus-specific code.
* lisp/gnus/gnus-art.el (gnus-mime-display-single): ... which has
been moved here.

Fix overfull hbox in Emacs manual

* doc/emacs/display.texi (Displaying Boundaries): Fix overfull
hbox.

Minor copyedits of Emacs manual

* doc/emacs/book-spine.texi: Fix the author attribution.
(Bug#49405)
* doc/emacs/back.texi: Update text.

(xref--insert-xrefs): Fix printing of line numbers

* lisp/progmodes/xref.el (xref--insert-xrefs):
Fix printing of line numbers when we have multiple files with
(e.g.) single match on the same line.

; * test/lisp/subr-tests.el (subr-tests-add-hook-depth): Fix a typo.

* lisp/progmodes/bug-reference.el: Refer to info manual node

Support reverting in Customize buffers

* lisp/cus-edit.el (custom--revert-buffer): New function (bug#26871).
(Custom-mode): Set up reversion.
(custom--invocation-options): New variable.
(custom-buffer-create-internal): Set it.

Count zero-length matches in `count-matches' correctly

* lisp/replace.el (how-many): Count zero-length matches correctly
(bug#27359).

Propagate :safe properties when autoloading defcustoms

* lisp/emacs-lisp/autoload.el (make-autoload): Propagate the :safe
property to the loaddefs file (bug#28104).

Make `bookmark--unfontify' more robust

* lisp/bookmark.el (bookmark--unfontify): Don't bug out if there's
no fontification recorded (bug#49341).

`image-save' doc string clarification

* lisp/image.el (image-save): Clarify what's being saved
(bug#49347).

Don't use LOCKNAME for temp files in Tramp (Bug#49406)

* lisp/net/tramp.el (tramp-handle-write-region):
* lisp/net/tramp-adb.el (tramp-adb-handle-write-region):
* lisp/net/tramp-sh.el (tramp-sh-handle-write-region):
* lisp/net/tramp-smb.el (tramp-smb-handle-write-region):
* lisp/net/tramp-sshfs.el (tramp-sshfs-handle-write-region):
Don't use LOCKNAME for temp file.  (Bug#49406)

* test/lisp/shadowfile-tests.el (password-cache-expiry):
Set `shadow-debug' also on emba.

Show hand cursor when dragging frame (Bug#49247)

* src/xdisp.c (note_mode_line_or_margin_highlight): Show hand
cursor when dragging frame with mode, tab or header line.
(syms_of_xdisp): Define Qdrag_with_mode_line,
Qdrag_with_header_line and Qdrag_with_tab_line.

Fix newly introduced error in tramp-tests.el (Bug#49406)

* test/lisp/net/tramp-tests.el (tramp--test-check-files):
Filter out empty strings.  (Bug#49406)

Ignore .dir-locals-2.el files more

* lisp/emacs-lisp/shadow.el (load-path-shadows-find):
* lisp/emacs-lisp/bytecomp.el (byte-recompile-directory): Ignore
.dir-locals-2.el, too (bug#23257).

Ensure 'call-process' interprets INFILE as a local path

* src/callproc.c (get_current_directory): Rename from
'encode_current_directory' and add boolean ENCODE flag.
(Fcall_process): Interpret INFILE relative to the working directory
from which PROGRAM is run, not 'default-directory'.
(call_process): Use 'get_current_directory'.
* src/process.c (Fmake_process): Use 'get_current_directory'.
* src/process.h (get_current_directory): Rename decl from
'encode_current_directory'.
* src/sysdep.c (sys_subshell): Use 'get_current_directory' (bug#49283).

Adjust eshell and ps-print to not use emacs-kill-hook

* lisp/ps-print.el (ps-kill-emacs-check):

* lisp/eshell/em-dirs.el (eshell-dirs-initialize)
(eshell-save-some-last-dir): Don't use `emacs-kill-hook' (bug#28943).

* lisp/eshell/em-hist.el (eshell-hist-initialize)
(eshell-save-some-history):

* lisp/url/url-util.el (url-unhex-string): Doc fix.

Avoid deprecation warnings with Texinfo 6.8

* doc/lispref/functions.texi (Function Safety):
* doc/misc/srecode.texi (Parts of SRecode):
* doc/misc/wisent.texi (Wisent Semantic, Wisent Lex):
* doc/misc/pcl-cvs.texi (Editing files):
* doc/misc/bovine.texi (top, Starting Rules)
(Bovine Grammar Rules, How Lexical Tokens Match)
(Optional Lambda Expression):
* doc/emacs/msdos.texi (Windows Keyboard):
* doc/emacs/buffers.texi (Several Buffers):
* doc/emacs/text.texi (Text): Avoid using @inforef, which is
deprecated.

Fix crash in GNUstep font coverage check

* src/nsfont.m (ns_charset_covers): Check coverage more accurately and
don't automatically assume the buffer is 8192 bytes long.

Remove unused variables

* src/nsterm.m ([EmacsView keyDown:]): Remove ns_fake_keydown as
there's no code that ever sets it to YES.

Fix thread memory management under NS

* src/thread.c (run_thread): Allocate an autorelease pool so that any
autoreleased Objective C objects are correctly released.

Update a few more IRC-related references to point to Libera.Chat

Merge from origin/emacs-27

348b2aed0c Update IRC-related references to point to Libera.Chat
b0e725e2fe Fix typo in c-macro-expand docstring

# Conflicts:
# doc/misc/erc.texi
# doc/misc/gnus-faq.texi
# doc/misc/rcirc.texi
# etc/NEWS
# lisp/erc/erc-services.el
# lisp/erc/erc.el
# lisp/ldefs-boot.el
# lisp/net/rcirc.el

; Merge from origin/emacs-27

The following commit was skipped:

d70dc6946a ; Auto-commit of loaddefs files.

Merge from origin/emacs-27

d898d3c73a ; * doc/emacs/back.texi: Fix a typo.
de52dbd4ad Update doc/emacs/ for a new printing of the Emacs Manual book

Update IRC-related references to point to Libera.Chat

Per GNU and FSF's announcements [0, 1] of moving official IRC channels
to the Libera.Chat IRC network, as well as several Emacs-related
channels following suit [2], update IRC-related references to reflect
the migration.

[0]: https://lists.gnu.org/archive/html/info-gnu/2021-06/msg00005.html
[1]: https://lists.gnu.org/archive/html/info-gnu/2021-06/msg00007.html
[2]: https://lists.gnu.org/archive/html/info-gnu-emacs/2021-06/msg00000.html

Speed up fido-mode

* lisp/icomplete.el (icomplete-completions): Speed up fido-mode (bug#48841).

Fix typo in c-macro-expand docstring

* lisp/progmodes/cmacexp.el (c-macro-expand): Fix typo.  (Bug#49356)

Retain documentation string when customizing theme

* lisp/cus-theme.el (customize-create-theme): When editing an existing
theme, load its doc string into the description widget, instead of
replacing it with a date stamp (Bug#49274).

Don't have desktop-save-mode query on `M-x kill-emacs'

* lisp/desktop.el (noninteractive): Prompting functions should not
be added to `kill-emacs-hook' (bug#28943).
(desktop-kill): Return t so that it can be used from
`kill-emacs-query-functions'.

Implement another fix for bug#49229

* lisp/minibuffer.el (read-file-name-default): Respect remote files.
(Bug#49229)

* lisp/net/tramp-sh.el (tramp-sh-handle-expand-file-name):
Handle special file names on MS Windows.

* lisp/net/tramp.el (tramp-file-name-handler): Revert patch.
(Bug#49229)

Hide emacs-mail.desktop, emacsclient-mail.desktop from menus

These are intended for use as mailto: URL handlers, not for launching
directly, so we can reduce clutter by hiding them from a desktop
environment’s menus.

* etc/emacs-mail.desktop, etc/emacsclient-mail.desktop: NoDisplay=true

Install emacs-mail.desktop and emacsclient-mail.desktop

* Makefile.in (install-etc): Install emacs-mail.desktop and
emacsclient-mail.desktop

Provide an emacsclient-mail.desktop

We provide both an emacs.desktop and an emacsclient.desktop, so for
consistency let’s do the same with mail.

* etc/emacs-mail.desktop: Extract suggestions for using emacsclient
from comments to create emacsclient-mail.desktop.
* etc/emacsclient-mail.desktop: Send mail using an existing Emacs
rather than starting a new one.

lisp/auth-source-pass.el: Keep legitimate spaces inside data

Users should be able to store a field as follows:
message: remember: Destroy the image and you will break the enemy

and later, recover the message untouched, i.e.:
"remember: Destroy the image and you will break the enemy"

* lisp/auth-source-pass.el (auth-source-pass--parse-data): Preserve
inner spaces at data.
* test/lisp/auth-source-pass-tests.el
(auth-source-pass-parse-with-colons-in-data): Add test.

; * lisp/auth-source-pass.el: Remove useless metadata

; * lisp/auth-source-pass.el: Improve docstrings

lisp/auth-source-pass.el: Support multiple hosts in search spec

* lisp/auth-source-pass.el (auth-source-pass-search): Accept a list of
strings for argument HOST.
(auth-source-pass--build-result): Rename argument HOST to HOSTS. Also
return value "host" from entry if it exists.
(auth-source-pass--find-match): Rename argument HOST to HOSTS. Iterate
over each host in HOSTS.
* test/lisp/auth-source-pass-tests.el: Add corresponding tests

Don't pass 'null-device' to 'call-process' in ispell

* lisp/textmodes/ispell.el (ispell-find-hunspell-dictionaries):
Replace 'null-device' with nil (bug#49283).  This allows running a
local ispell process when editing a buffer editing a file via Tramp.

New frame parameter 'drag-with-tab-line' (Bug#49247)

The new frame parameter 'drag-with-tab-line' allows to move
frames by dragging their topmost windows' tab line with the
mouse thus achieving a behavior similar to that provided by
the 'drag-with-header-line' parameter.

* lisp/mouse.el (mouse-drag-tab-line): New function.
(mouse-drag-frame-resize, mouse-drag-frame-move)
([tab-line down-mouse-1]): Handle tab line dragging in various
keymaps.
* doc/lispref/frames.texi (Mouse Dragging Parameters): Describe
new parameter 'drag-with-tab-line'.
* etc/NEWS: Add entry for 'drag-with-tab-line'.

Fix a problem of cus-start.el for remote default directories

* lisp/cus-start.el: Bind `default-directory' to "/" when calling
`shell-command-to-string' for a local value on DARWIN.