* paths.el (abbrev-file-name): Move to abbrev.el.

* paths.el (abbrev-file-name): Move to abbrev.el.
* abbrev.el (abbrev-file-name): Move from paths.el.
Obey user-emacs-directory.
* calc/calc.el (calc-settings-file): Don't autoload and instead obey
user-emacs-directory.
* dos-fns.el (dos-reevaluate-defcustoms): Don't reevaluate
abbrev-file-name and calc-settings-file any more.
* startup.el (command-line): Recompute abbrev-file-name and
abbreviated-home-dir.
(normal-no-mouse-startup-screen): Improve the generic code and get rid
of the special code for when C-h bindings haven't been changed.
(display-startup-echo-area-message): Use with-current-buffer.
(command-line-1): Use a list of strings, rather than a list of lists
of strings for longopts.