autotools: s/INCLUDES/AM_CPPFLAGS/

autotools 2.69 onwards is now warning that the older INCLUDES directive has
been renamed.  Since 2.69 is itself fairly well established, this shouldn't
break backwards compatibility.
Merge remote-tracking branch 'cvs/branch-2_6' into branch-2_6
* New option !raise to WarpToWindow command.
* Retire NoPPosition/NoUsPosition from the man page, prefer the new syntax.
* Fix some ICON_DBG messages.
* Removed old debug code accidentally left in CMD_Beep.
* ChangeLog.
Merge remote-tracking branch 'remotes/cvs/branch-2_6' into branch-2_6
* FAQ cleanup (whitespace, typo, de-capitalize section headings).
* Add new section 8 to FAQ ("Taming problematic application windows).
* Update manpage installdir in INSTALL.fvwm.
* Anothe INSTALL.fvwm correction.
* FvwmIconMan: New options IconAndSelectButton, IconAndSelectColorset.
* FvwmConsole requests only packets that it can handle.

This dramatically reduces the number of packets that are sent to the module.
* Suppress spurious braodcast packets to the modules during interactive resize.
Merge remote-tracking branch 'cvs/branch-2_6' into branch-2_6

Conflicts:
	NEWS
* New extended wariables $[wa.x/y/width/heigt] and $[dwa.x/y/width/height]

They expand to the geometry of the ewmh working area or ewmh dynamic working
area.
* Clean up NEWS file.
Merge remote-tracking branch 'cvs/branch-2_6' into branch-2_6

Conflicts:
	NEWS
* New Resize argument suffixes "wa" and "da".

They refer to the widht/heigt of the EWMH working area and the EWMH dynamic
working area.