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Exclude trailing null in string copies.

(kill-emacs-hook): Add the new hook.

(Fcompute_motion): Likewise.

the indesc open was moved inside a fork.
Handle MAIL_USE_LOCKF.
(MAIL_USE_SYSTEM_LOCK): New conditional macro.
Define it if either MAIL_USE_FLOCK or MAIL_USE_LOCKF.

Use that, not p1start, when checking for char off left edge.

(mark_window_display_accurate, redisplay):
Set window_end_valid to the buffer displayed, not Qt.

(note_mouse_highlight): Check window still shows buffer that was
displayed in it.

Instead, store -1 in b->save_length.  And don't auto save
if there is -1 there.

(Vinhibit_file_name_handlers): New var.
(syms_of_fileio): Set up Lisp var.
(Ffind_file_name_handler): Obey the variable.

(Man-getpage-in-background): Don't hardcode the program name.

intersects the overlay.

(edebug-emacs-version-specific): Test for not-version-18.

(uncompress-backup-file): Use it.
(uncompress-while-visiting): Use that var.  Handle .gz suffix.
(auto-mode-alist): Handle .gz suffix.
(find-compressed-version): Handle .gz suffix.

how to back up the master saved-places file.
(save-place-alist-to-file): Bind version-control depending on
`save-place-version-control'.
(hook for find-file-hooks): Specify the APPEND arg to add-hook.

and for continuation in mid character.
(message2): Call frame_up_to_date_hook.

Set mouse_face_deferred_gc when that case arise.
(XTframe_up_to_date): If mouse_face_deferred_gc, redo highlighting.

(show_mouse_face): Turn off cursor only if it's
in the area being manipulated.
(XTupdate_begin): Don't turn off highlight if we aren't updating
the window that it is in.