; * lisp/mwheel.el (mouse-wheel-scroll-amount): Doc fix.

Use more help-key-binding faces in repeat-mode message

* lisp/repeat.el (repeat-echo-message-string): Use
substitute-command-keys for repeat-exit-key as well.

* lisp/mwheel.el: More fixes for global-text-scale (bug#48307)

(mouse-wheel-global-text-scale): Move down closer to mouse-wheel-text-scale.
(mouse-wheel-scroll-amount): Add :value global-text-scale and mention it
in the docstring.
(mouse-wheel-global-text-scale, mouse-wheel--setup-bindings):
Add mouse-wheel-down-alternate-event and mouse-wheel-up-alternate-event.
Allow a list of modifiers for 'text-scale'.

Improve calc-dispatch-help docstring

* lisp/calc/calc-misc.el (calc-dispatch-help): Use command
substitutions.

Tramp code cleanup

* lisp/net/tramp-cache.el (tramp-get-file-property)
(tramp-get-connection-property): Make DEFAULT optional.  Adapt callees.

* lisp/net/tramp.el:
* lisp/net/tramp-adb.el:
* lisp/net/tramp-cmds.el:
* lisp/net/tramp-compat.el:
* lisp/net/tramp-crypt.el:
* lisp/net/tramp-ftp.el:
* lisp/net/tramp-fuse.el:
* lisp/net/tramp-gvfs.el:
* lisp/net/tramp-integration.el:
* lisp/net/tramp-sh.el:
* lisp/net/tramp-smb.el:
* lisp/net/tramp-sshfs.el:
* lisp/net/trampver.el: Code cleanup.

* test/lisp/net/tramp-tests.el (tramp--test-sh-no-ls--dired-p)
(tramp--test-with-proper-process-name-and-buffer): Code cleanup.

abort-redisplay: Add missing unbind_to in 'recenter'

* src/window.c (recenter): Add ubind_to before early return.
(Bug#56369)

lisp/elec-pair.el: Simplify last change

* lisp/elec-pair.el (electric-pair--with-syntax):
Rename from `electric-pair--with-text-syntax`.
Make `start` mandatory.  Run `body` in the normal syntax if `start` is nil.
(electric-pair--with-syntax-1): New function, extracted from
`electric-pair--with-text-syntax`.
(electric-pair-syntax-info, electric-pair--balance-info):
Adjust calls accordingly.

Fix dired-goto-subdir prompt

* lisp/dired-aux.el (dired-goto-subdir): Fix prompt and improve
docstring.  Add interactive mode tag for dired-mode.

Fix warnings in my last commit

* lisp/textmodes/emacs-news-mode.el (outline): Require.

Improve navigation keybindings in emacs-news-mode

* lisp/textmodes/emacs-news-mode.el (emacs-news-common-map): New
defvar-keymap.  Bind navigation commands as in 'org-mode' and
'outline-minor-mode'.
(emacs-news-mode-map): Inherit from 'emacs-news-common-map'.
(emacs-news-view-mode-map): New defvar-keymap; inherit from
'emacs-news-common-map'.

Merge branch 'master' of git.savannah.gnu.org:/srv/git/emacs

Fix implementation of 'reset' face values

* src/xfaces.c (Finternal_merge_in_global_face)
(gui_supports_face_attributes_p):  Only modify local copy of face
attributes when replacing 'reset' pseudo-values with real values.
(Bug#38771)

; * etc/NEWS: Tag two items.

Move dired-clean-up-buffers-too to dired.el

* lisp/dired-x.el (dired-clean-up-buffers-too)
(dired-clean-confirm-killing-deleted-buffers): Move from here...
* lisp/dired.el (dired-clean-up-buffers-too)
(dired-clean-confirm-killing-deleted-buffers): ...to
here.  (Bug#21981)
(dired-clean-up-after-deletion): Adjust documentation.
* etc/NEWS: Announce the change.

Fix `python-nav-beginning-of-defun' line continuation using backslash

* lisp/progmodes/python.el (python-nav--beginning-of-defun): Allow
line continuation using backslash in defuns (bug#55702).
(python-info-looking-at-beginning-of-defun): Add CHECK-STATEMENT
argument.

* lisp/dired-x.el (dired-omit-size-limit): Increase value.

Make string-limit with encoding return complete glyphs

* lisp/emacs-lisp/subr-x.el (string-limit): Return more correct
results in the CODING-SYSTEM case for coding systems with BOM and
charset designations (bug#48324).  Also amend the algorithm to
return complete glyphs, not just complete code points.

Improve performance when rejecting XI touch event

* src/xterm.c (handle_one_xevent): Avoid sync handling simple
error.

Fix streaming problems in nnimap-retrieve-headers

* lisp/gnus/nnimap.el (nnimap-retrieve-headers): Don't stream the
UID FETCH commands, since the server may return the results
out-of-order (bug#56332).

Add new function `seq-split'

* doc/lispref/sequences.texi (Sequence Functions): Document it.

* lisp/emacs-lisp/seq.el (seq-split): New function.

* lisp/emacs-lisp/shortdoc.el (sequence): Mention it.

elec-pair: Fix bug incorrectly hiding syntax-propertize-function

* lisp/elec-pair.el (electric-pair--with-text-syntax): New macro.
(electric-pair-syntax-info):
(electric-pair--balance-info):
(electric-pair--syntax-ppss, electric-pair--balance-info): Use it.
(electric-pair--with-uncached-syntax): Remove (bug#49629).

The main bug that this is fixing is `syntax-propertize-function' being
hidden in `electric-pair--balance-info' when the original syntax table
is to be used, not `electric-pair-text-syntax-table'.

Notably, this causes `electric-pair-mode' to often misbehave in HTML
files when pairing angle brackets.

This commit also flushes the cache before installing
`electric-pair-text-syntax-table', to prevent cached syntax for the
original table from affecting things.

; * src/xfaces.c (Finternal_set_lisp_face_attribute): Fix last change.

Improve efficiency of `x_frame_highlight' and `x_frame_unhighlight'

* src/xterm.c (x_frame_highlight, x_frame_unhighlight): Don't
sync catching errors.

* lisp/dired.el (dired-do-eww): New command.

Improve dired-do-{info,man} error handling

* lisp/dired.el (dired-do-man, dired-do-info): Use
'dired-get-file-for-visit' to get better error handling.
Interactive mode tagging.

Implement pseudo-value 'reset' of face attrributes

* doc/lispref/display.texi (Face Attributes):
* etc/NEWS: Document the new pseudo-value 'reset'.

* src/xfaces.c (realize_named_face, lookup_derived_face)
(gui_supports_face_attributes_p, lookup_named_face)
(Finternal_merge_in_global_face, merge_named_face, merge_faces):
Handle the 'reset' pseudo-value of a face's attribute.
(syms_of_xfaces): New symbol 'reset'.
(RESET_P): New macro.
(check_lface_attrs, Finternal_set_lisp_face_attribute): Allow
'reset' as a value of any attribute except ':inherit'.
(Bug#38771)

* lisp/leim/quail/indian.el ("malayalam-mozhi"): Set DETERMINISTIC.

Fix deadlocks with very old versions of libXi

* src/xfns.c (setup_xi_event_mask, Fx_create_frame): Set
`xi_mask' ourselves if the version of libXi is too old to have
working XIGetSelectedEvents.
* src/xterm.c (x_destroy_window): Free `xi_mask' with xfree in
that case.

; Merge from origin/emacs-28

The following commit was skipped:

d927181b1a * lisp/progmodes/cc-mode.el (c-common-init): Bind case-fol...

Merge from origin/emacs-28

dc3d01a5af CC Mode: Fix a c-backward-token-2 call wrongly jumping bac...
e390396e68 Doc fixes; don't use obsolete names
c85f7c2e8a Don't refer to obsolete alias for insert-char
60ad45c5d2 Don't use obsolete face name in manoj-dark-theme

Speed up receiving drops over slow connections

* lisp/x-dnd.el (x-dnd-debug-errors): New variable.
(x-dnd-handle-drag-n-drop-event): Bind
`x-fast-protocol-requests' to t if that is off.

* src/xfns.c (Fx_change_window_property):
(Fx_delete_window_property):
* src/xselect.c (Fx_send_client_message, x_send_client_event):
Don't sync to check for errors if fast protocol requests are
enabled.

* src/xterm.c (x_catch_errors_for_lisp, x_check_errors_for_lisp)
(x_uncatch_errors_for_lisp): New functions.
(syms_of_xterm): New variable `x-fast-protocol-requests'.
* src/xterm.h: Update prototypes.

REQUIRE-MATCH doc string clarification

* src/minibuf.c (Fcompleting_read):
* lisp/minibuffer.el (read-file-name): Clarify what the return
value is in the REQUIRE-MATCH function case.

Fix some typos in NEWS

Add sanity check for Emacsen distributed without .el files

* src/lread.c (maybe_swap_for_eln): Add sanity check for Emacsen
distributed without .el files (bug#48342).

* lisp/progmodes/cc-mode.el (c-common-init): Bind case-fold-search to nil

Backport:  This fixes bug #53605.

CC Mode: Fix a c-backward-token-2 call wrongly jumping back over macros.

This fixes bug #56256.

* lisp/progmodes/cc-fonts.el (c-font-lock-c++-lambda-captures): Replace a
c-backward-token-2, which could jump back too far leading to an infinite
loop, with a save-excursion to remember the point we've got to go back to.

Filter out nul bytes when killing from a *grep* buffer

* lisp/progmodes/grep.el (grep-mode): Filter out the nul bytes
(bug#48321).

Add more separators to longlines-mode

* lisp/obsolete/longlines.el (longlines-breakpoint-chars): New
custom to have multiple breakpoint chars.
(longlines-set-breakpoint): Add a target-column parameter and use
`longlines-breakpoint-chars'.
(longlines-find-break-backward, longlines-find-break-foreward):
Use `longlines-breakpoint-chars'.
(longlines-wrap-line): Do not insert space upon merging, just
remove the soft newline. Fix "space before tab" in indent.
(longlines-merge-lines-p): Use the new target-column parameter to
find out if the next line could be merged with the current one.
(longlines-encode-region): Do not replace a soft newline with a
space, just remove it.
* etc/NEWS: New user option 'longlines-breakpoint-chars'

Unobsolete longlines-mode (bug#18589)

Use help-key-binding face in text scale adjust messages

* lisp/face-remap.el (text-scale-adjust)
(global-text-scale-adjust): Use substitute-command-keys.

Use help-key-binding face in repeat-mode message

* lisp/repeat.el (repeat-echo-message-string): Use
substitute-command-keys.

Make dired-jump repeatable in repeat-mode

* lisp/dired.el (dired-jump-map): New variable.
(dired-jump): Put 'repeat-map' property with 'dired-jump-map'.

; * etc/NEWS: Fix typo in recently-added entry.

; Minor fixes for 'global-text-scale-adjust'

* doc/emacs/display.texi (Text Scale): Improve indexing.

* lisp/mwheel.el (mouse-wheel-global-text-scale): Doc fix.
* lisp/face-remap.el (global-text-scale-adjust-resizes-frames):
Fix a typo.
(global-text-scale-adjust-limits): Doc fix.
(Bug#48307)

Move dired-info and dired-man from dired-x to dired

* lisp/dired-x.el (dired-bind-man, dired-bind-info): Change into
defvars and make obsolete.
(dired-extra-startup): Doc fix.
(dired-info, dired-man): Move from here...
* lisp/dired.el (dired-do-info, dired-do-man): ...to here and
rename.  (Bug#21981)

* lisp/dired.el (dired-mode-map): Bind 'I' and 'N' to 'dired-do-info'
and 'dired-do-man'.

* doc/misc/dired-x.texi (Miscellaneous Commands): Remove documentation
of 'dired-info' and 'dired-man'.
* doc/emacs/dired.texi (Dired Enter): Document 'dired-do-info' and
'dired-do-man'.
* etc/NEWS: Announce the above changes.

Prefer defvar-keymap in nxml/*.el

* lisp/nxml/nxml-mode.el (nxml-mode-map):
* lisp/nxml/nxml-outln.el (nxml-outline-prefix-map)
(nxml-outline-show-map, nxml-outline-hiding-tag-map)
(nxml-outline-showing-tag-map): Prefer defvar-keymap.

Fix error handling for XCB Xlib

* src/xterm.c (xm_send_drop_message)
(xm_send_top_level_enter_message, xm_send_drag_motion_message)
(xm_send_top_level_leave_message, x_dnd_compute_toplevels)
(x_dnd_send_enter, x_dnd_send_position, x_dnd_send_leave)
(x_dnd_send_drop, handle_one_xevent, x_catch_errors_with_handler)
(x_request_can_fail, x_clean_failable_requests)
(x_ignore_errors_for_next_request, x_stop_ignoring_errors)
(x_uncatch_errors, x_check_errors, x_had_errors_p, x_error_handler)
(frame_set_mouse_pixel_position, x_focus_frame): Record serial
sequences instead of simply the next request when ignoring a
single request.  Use XNextRequest instead of NextRequest, since
the latter is unreliable when using Xlib built with XCB.

* src/xterm.h (struct x_failable_request): New struct..
(struct x_display_info): Make failable request variables the
right type.

Fix display disconnect when tooltip frame is alive

* src/xterm.c (x_connection_closed): Don't dereference nil when
loop finds a tooltip frame.

Command for global adjustments to the default face

* lisp/face-remap.el (global-text-scale-adjust): New command.
(text-scale-adjust): Refer to the new related command.
(global-text-scale-adjust-resizes-frames): New user option.

* lisp/mwheel.el (mouse-wheel-scroll-amount): Add the new command
to the mouse wheel scrolling events.
(mouse-wheel-global-text-scale): New function.
(mouse-wheel-mode): Use the new function with mouse-wheel-mode.

* doc/emacs/display.texi (Text Scale): Document the new command and
the new user option.

* etc/NEWS: Mention the new command and its bindings, and the new
user option.

Add a comment about buffer_local_value/find_symbol_value

* src/data.c: Note that buffer_local_value is very similar
(bug#48281).

Allow NUL characters in JSON input

* src/json.c (Fjson_parse_string, Fjson_parse_buffer): Allow NUL
characters in JSON (bug#48274).

Make comint-watch-for-password-prompt more resilient

* lisp/comint.el (comint-watch-for-password-prompt): Don't try to
send commands to the process after it's exited (bug#56336).  (This
commonly happens when invoked via `M-&'.)

; Fix typos.

Preserve connection-local settings in dired

* lisp/dired-aux.el (dired-shell-command):
Preserve connection-local settings.  (Bug#56333)

Add native-compile-prune-cache command

* lisp/emacs-lisp/comp.el (native-compile-prune-cache): New
command (bug#48108).

native-comp-eln-load-path doc string fix

* src/comp.c (syms_of_comp): Fix grammar in doc string.

Doc fixes; don't use obsolete names

* etc/compilation.txt:
* lisp/mh-e/mh-funcs.el (mh-kill-folder): Don't use obsolete
names.

Don't refer to obsolete alias for insert-char

* lisp/leim/quail/persian.el: Don't refer to obsolete alias for
insert-char.

Don't use obsolete face name in manoj-dark-theme

* etc/themes/manoj-dark-theme.el (change-log-acknowledgment): Don't
use obsolete/non-existent face name.

* src/sheap.h (STATIC_HEAP_SIZE): Double the size of static heap.

Completely get rid of races during Motif drag window creation

* src/xterm.c (x_special_window_exists_p): New function.
(xm_get_drag_window_1): Rework workflow and display grabbing.

; Fix typos.

* src/xfns.c (Fx_server_input_extension_version): Fix typo.

Merge from origin/emacs-28

1c3d107cb5 Fix "C-u C-x =" for SPC
7e33618bbc ; * src/fns.c (Frequire): Fix a typo in the doc string.  (...
6908309827 Doc fixes: don't refer to some obsolete items
dc3cb749f3 Remove obsolete cust-print from elisp index
9ffbbddf8e * admin/make-tarball.txt: Minor clarifications.
f5421104e9 Fix external image conversion on MS-Windows
6f22631a63 * doc/emacs/buffers.texi (Indirect Buffers): Mention modif...

# Conflicts:
# doc/emacs/buffers.texi
# lisp/emacs-lisp/nadvice.el
# lisp/image/image-converter.el

Fix repeated "the"

* configure.ac (EMACS_CONFIG_FEATURES):
* etc/NEWS:
* lisp/dnd.el (dnd-begin-text-drag):
* src/pgtkfns.c (Fx_display_mm_height, Fx_display_mm_width):
(Fx_display_backing_store, Fx_display_visual_class):
* src/xterm.c: Fix repeated "the".  (Bug#56341)

Copyright-paperwork-exempt: yes

Fix fallout from bug#50143

* lisp/language/ind-util.el (indian-tml-base-table)
(indian-tml-base-digits-table): Add TAMIL OM sign and more Sanskrit
consonants to the table (bug#50143) (bug#56323).

Improve rcirc's CertFP documentation

* doc/misc/rcirc.texi: Clarify meaning of key and password
* lisp/net/rcirc.el (rcirc-authinfo): Add example

Fix drag-and-drop from Chromium family browsers

* lisp/x-dnd.el (x-dnd-copy-types): New defcustom.
(x-dnd-default-test-function): Check if data type warrants using
`copy'.
(x-dnd-do-direct-save): Offer application/octet-stream as well.

* lisp/ruler-mode.el (ruler-mode-map): Use defvar-keymap.

* lisp/epa-mail.el (epa-mail-mode-map): Use defvar-keymap.

Font lock \\`' command substitutions in docstrings

* lisp/emacs-lisp/lisp-mode.el (lisp-el-font-lock-keywords-2):
Support \\`' command substitutions.

Add interactive XDS test

* test/lisp/dnd-tests.el (dnd-tests-direct-save): New test.

* editfns.c (Fbyte_to_string): Use `make_unibyte_string`

Return the correct action from the Lisp side of drag-and-drop

* lisp/x-dnd.el (x-dnd-handle-drag-n-drop-event): Select
`window' when handling internal DND events.
(x-dnd-handle-unsupported-drop): Return an appropriate action.
* src/keyboard.c (kbd_buffer_get_event):
* src/termhooks.h (enum event_kind): Delete
`UNSUPPORTED_DROP_EVENT'.
* src/xterm.c (x_dnd_send_unsupported_drop): Set flags instead
of recording input event.
(x_clear_dnd_monitors): Rename to `x_clear_dnd_variables'.  Also
clear unsupported drop data.
(x_dnd_begin_drag_and_drop): Run unsupported drop function
inline (and safely), and use its return value if it returned a
symbol.
(syms_of_xterm): Update doc string of
`x-dnd-unsupported-drop-function'.

* src/xterm.h: Update declarations.

Use command substitution in kmacro.el

* lisp/kmacro.el (kmacro-bind-to-key, kmacro-view-macro-repeat):
Use command substitution.

* doc/misc/erc.texi (Connecting): Fix typo.

Fix "C-u C-x =" for SPC

* lisp/descr-text.el (describe-char): Don't report 'nobreak-space'
face for SPC.  (Bug#56337)

; * doc/misc/erc.texi: Fix typo

; Fix regexp in ERC test-server utility

* test/lisp/erc/resources/erc-d/erc-d-i.el (erc-d-i--tag-unescaped-regexp):
Thanks to Mattias and relint for catching this.

Fix quoting of file names in 'ctags'

* lib-src/etags.c (main) [WINDOWSNT || MSDOS]: Quote file names
according to the rules of the system shells.

Add support for <mark> in shr

* lisp/net/shr.el (shr-mark): New face (bug#48211).
(shr-tag-mark): New function

Fix elisp-byte-compile-buffer requirements

* lisp/progmodes/elisp-mode.el (elisp-byte-compile-buffer):
Require bytecomp so that byte-compile-dest-file-function is
defined.  (The byte compiler didn't catch this, because it's
defined in bytecomp.)

Fix typo in Property Search manual entry

* doc/lispref/text.texi (Property Search): Fix typo (bug#56329).

Make time-stamp-tests.el work in a Norwegian language enviroment

The short version of names for days/month is not necessary the same as
limiting the string with a #n operator.  For instance:

(format-time-string "%^A" time)
=> "FREDAG"

(format-time-string "%^a" time)
=> "FR."

(time-stamp-string "%#3a" time)
=> "FRE"

Document XDS stuff

* doc/emacs/frames.texi (Drag and Drop):
* doc/lispref/frames.texi (Drag and Drop): Add documentation
about XDS features.
* etc/NEWS: Tag entry.

Make it easier to debug nnimap-retrieve-headers

* lisp/gnus/nnimap.el (nnimap--max-retrieve-headers): New variable
to ease debugging.
(nnimap-retrieve-headers): Use it.

Make the emoji-zoom commands use a transient map for repetition

* lisp/international/emoji.el (emoji-zoom-increase)
(emoji-zoom-decrease): Use a transient map for convenience.

; * test/lisp/erc/erc-networks-tests.el: escape `*`s in regexp

Expand file names read from XDS functions

* lisp/x-dnd.el (x-dnd-handle-xds-drop): Expand file names
before use.  Some GUI dialogs read un-expanded file names.

Prevent XdndPosition messages from rarely being sent out of band

* src/xterm.c (handle_one_xevent): Don't clear
`x_dnd_waiting_for_status_window' if a pending position message
was sent in reply to an XdndStatus event.

Support receiving XDS drops correctly

* etc/NEWS: Announce new feature.  It is not yet documented.
* lisp/x-dnd.el (x-dnd-known-types): Add XdndDirectSave0.
(x-dnd-direct-save-function): New defcustom.
(x-dnd-xdnd-to-action): Add `direct-save'.
(x-dnd-maybe-call-test-function): If XDS is present, use `direct-save'.
(x-dnd-find-type): New function.
(x-dnd-handle-xdnd): Handle XDS position and drop messages.
(x-dnd-handle-direct-save): Don't use local-file-uri if nil.
(x-dnd-save-direct): New function.
(x-dnd-handle-octet-stream-for-drop):
(x-dnd-handle-xds-drop): New functions.

; Fix documentation of recent ERC changes

* lisp/erc/erc.el (erc-inhibit-multiline-input)
(erc-ask-about-multiline-input): Doc fixes.

* doc/misc/erc.texi (Connecting): Fix typos, grammar, wording,
punctuation, markup, and indexing.

; Tag ERC channel-buffers test as unstable

* test/lisp/erc/erc-networks-tests.el (erc-networks--id,
erc-networks--id-create): Attempt to fix arity of mocked `float-time'.

* test/lisp/erc/erc-scenarios-base-reuse-buffers.el
(erc-scenarios-base-reuse-buffers-channel-buffers--disabled): Tag as
being unstable.

; * src/fns.c (Frequire): Fix a typo in the doc string.  (Bug#56328)

Copyright-paperwork-exempt: yes

Update publicsuffix.txt from upstream

* etc/publicsuffix.txt: Update from
https://publicsuffix.org/list/public_suffix_list.dat
dated 2022-06-29 19:13:08 UTC.

Add tests for XDS protocol support

* test/lisp/x-dnd-tests.el (x-dnd-tests-xds-property-value): New
variable.
(x-window-property): Handle new kind of window property.
(x-dnd-tests-xds-target-dir, x-dnd-tests-xds-name)
(x-dnd-tests-xds-include-hostname): New variables.
(x-dnd-tests-call-xds-converter): New function.
(x-begin-drag, x-change-window-property):
(x-delete-window-property): New replacement functions.
(x-dnd-tests-do-direct-save-internal): New function.
(x-dnd-tests-do-direct-save): New test.

Fix `clipboard-yank' inserting off the kill ring instead of CLIPBOARD

* lisp/select.el (gui-last-cut-in-clipboard)
(gui-last-cut-in-primary): New variables.
(gui-select-text): Set those variables.
(gui--selection-value-internal, gui-selection-value): Don't
return nil if the last cut did not own the chosen
selection.  (bug#56325)

Disable middle click selection emulation during XDS

* doc/lispref/frames.texi (Drag and Drop): Document new
variable.
* lisp/x-dnd.el (x-dnd-do-direct-save): Disable drop emulation
during XDS drag-and-drop.

* src/keyboard.c (kbd_buffer_get_event): Handle recorded value.
* src/xterm.c (x_dnd_do_unsupported_drop): Return if new
variable is nil.
(x_dnd_send_unsupported_drop): Record value of new variable in
events.
(x_dnd_begin_drag_and_drop): Handle recorded value.
(syms_of_xterm): New variable `x-dnd-use-unsupported-drop'.

; Help ERC test fixture better withstand reordering

* test/lisp/erc/erc-tests.el (erc-tests--with-process-input-spy):
Shadow hook to prevent the erc-button module from interfering with
tests using this helper.

Update ERC's Info doc with network-ID related changes

* doc/misc/erc.texi: Update the `erc' and `erc-tls' entry-point
sections with the new :id keyword parameter.  Expand the auth-info
related information in the passwords section.  Remove all mention of
the variable `erc-rename-buffers', whose "on" behavior has been made
permanent.

* etc/ERC-NEWS: Add new section for future 5.5 release.