Attempt to solve bug #17497 by minimizing cursor motion during TTY menu updates.

 src/term.c (tty_menu_display): Don't position cursor here.  Instead,
 pass the cursor coordinates to update_frame_with_menu.
 (tty_menu_activate): Send the hide cursor command only once in an
 iteration through the outer 'while' loop.
 src/dispnew.c (update_frame_1): Accept an additional argument
 SET_CURSOR_P, and position the cursor at the end of the frame
 update only if that argument is non-zero.  All callers changed to
 provide the additional argument as non-zero, except for
 update_frame_with_menu.
 (update_frame_with_menu): Accept 2 additional arguments ROW and
 COL; if they are non-negative, instruct update_frame_1 not to
 position the cursor, and instead position it according to ROW and
 COL.
 src/dispextern.h (update_frame_with_menu): Update prototype.
Fix infloop of -nw session at exit on MS-Windows under a debugger.

 src/sysdep.c (reset_sys_modes): Use cursorX, not curX, as the latter
 contains garbage on WINDOWSNT (which could potentially infloop at
 exit).
nt/INSTALL: Instructions how to start Bash.
Some documentation for signing of packages

* doc/emacs/package.texi (Package Menu, Package Installation):
Mention signed packages.

* doc/lispref/package.texi (Package Archives): Mention signing packages.

* lisp/emacs-lisp/package.el (package-check-signature)
(package-unsigned-archives): Doc fixes.

* etc/NEWS: Related edits.
* lisp/emacs-lisp/package.el: Comment update
Spelling fixes.
* etc/themes/deeper-blue-theme.el (diff-added, diff-changed, diff-removed):
Set face definitions explicitly.  Inherit indicator faces from them.
Document incompatible overlay priority change

* doc/lispref/display.texi (Overlay Properties): Update re priority. 

* etc/NEWS: Related edit.
* admin/FOR-RELEASE: Mention ack.texi
Doc updates re window-setup-hook

* lisp/startup.el (window-setup-hook): Doc fix.

* doc/lispref/display.texi (Window Systems): Remove window-setup-hook.

* doc/lispref/os.texi (Startup Summary, Init File):
Improve description of window-setup-hook.
(Terminal-Specific): Update window-setup-hook cross-reference.

* doc/lispref/hooks.texi (Standard Hooks):
Update window-setup-hook cross-reference.
* lisp/international/mule-cmds.el (ucs-names): Add special entry for BEL.
* lisp/vc/vc-hg.el (vc-hg-working-revision): Use "hg parent" and
vc-hg-command.
* lisp/desktop.el: Activate auto-saving on window configuration changes.
(desktop-save-mode, desktop-auto-save-timeout): Add/remove
`desktop-auto-save-set-timer' to/from `window-configuration-change-hook'.
(desktop-auto-save-set-timer): Change REPEAT arg of
`run-with-idle-timer' from t to nil.
http://lists.gnu.org/archive/html/emacs-devel/2014-06/msg00147.html
Port better to AIX.

* configure.ac (with_xpm_set): New shell var.
(_THREAD_SAFE): Define on AIX if HAVE_PTHREAD.
(with_xpm): Default to 'no' on AIX.
(LIBXPM): Append -lXpm if -lXaw is also used, as the latter
requires the former on AIX.
Doc tweaks re prettify-symbols-mode

* doc/emacs/programs.texi (Prettifying Symbols): Remove node.
(Misc for Programs): Mention more briefly here.

* doc/emacs emacs.texi (Top): Update menu.
Some Acknowledgments updates for the manual

* doc/emacs/ack.texi (Acknowledgments): Updates.

* doc/emacs/emacs.texi (Acknowledgments): Updates.
Doc tweaks re < etc

* doc/lispref/numbers.texi (Comparison of Numbers): Copyedits.

* src/data.c (Flss, Fgtr, Fleq, Fgeq): Doc tweaks.
* src/fileio.c (write-region-inhibit-fsync): Doc tweak.
Doc tweak re fullscreen/maximize

* doc/emacs/frames.texi (Frame Commands): Copyedits re M-F10, F11.

* doc/emacs/cmdargs.texi (Window Size X): Copyedits.
Doc tweaks re text-mode menus

* doc/emacs/screen.texi (Menu Bar): Copyedits.

* doc/emacs/msdog.texi (Windows Keyboard): F10 menus are now a general feature.