nx-libs.spec: Let libNX_X11-6 and libNX_X11-devel conflict with deprecated libXau6 and libXau-devel.

  - Inject LIBDIR rather than USRLIBDIR into nx-libs's main Makefile
  - Install include files Xauth.h into libNX_X11-devel.
  - Install hi-jacking libX11 library symlinks.
  - Install VERSION.nx* files into nxagent / nxproxy packages.

debian/control: Add some hard and exact-versioned dependencies for our bin:packages. Assure that no old share lib packages with the same set of symbols remain on the system when upgrading.

Attributes GH PR #177: https://github.com/ArcticaProject/nx-libs/pull/177
Reviewed by: Vadim Troshchinskiy <vadim@qindel.com> --  Tue, 05 Jul 2016 00:02:17 -0700

 TryClientEvents already did this; this commit just moves the assignment
 one level down so that no event source has to worry about sequence
 numbers.

 ...No event source, that is, except XKB, which inexplicably calls
 WriteToClient directly for several events.
Signed-off-by: Jamey Sharp <jamey@minilop.net>
Reviewed-by: Julien Cristau <jcristau@debian.org>
Reviewed-by: Adam Jackson <ajax@redhat.com>
 Backport to nx-libs: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>

 This matches the test in TryClientEvents, and is a superset of tests
 done by the callers of these functions. The consequence of forgetting
 these tests is a server crash, so they're always desirable. In my
 opinion, it's better to not require the callers to remember to do these
 checks.

 For callers that don't do very much work before calling WriteToClient or
 WriteEventsToClient, I've removed the redundant checks.

 Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=27497Signed-off-by: Jamey Sharp <jamey@minilop.net>
 Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Julien Cristau <jcristau@debian.org>
Reviewed-by: Adam Jackson <ajax@redhat.com>
 Backport to nx-libs: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>

Attributes GH PR #168: https://github.com/ArcticaProject/nx-libs/pull/168
Reviewed by: Vadim Troshchinskiy <vadim@qindel.com> --  Mon, 04 Jul 2016 11:15:20 -0700

 INITARGS was a hardcoded define to void.  Since knowing the function
 signature for your extensions is kinda useful, just replace it with a
 hardcoded void, but leave the define there for API compatibility.
Signed-off-by: Tomas Carnecky <tom@dbservice.com>
Reviewed-by: Daniel Stone <daniel@fooishbar.org>
Reviewed-by: Cyril Brulebois <kibi@debian.org>
Reviewed-by: Jamey Sharp <jamey@minilop.net>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Keith Packard <keithp@keithp.com>
 Backport to nx-libs: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>

Remove INITARGS braindamage, change to void; add XkbExtensionInit prototype to xkb.h. Explicitly initialise nTypes in xkb.c.

 Backported from X.org:

 commit a1cb69dc28fdbfbdfaf954e0bec221f759462399
 Author: Keith Packard <keithp@keithp.com>
 Date:   Fri Nov 15 22:05:44 2013 +0900

    Xext: Clean up warnings

    GC funcs and ops are const.
    Remove unused variables.
Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>

 Backport to nx-libs: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>

Xserver/os/xdmauth.c: Avoid compiler warnings due to -Wswitch being enabled. Use if statement rather than switch.

 Backported from X.org. Found in commit...

 commit 7deaaa797cf8e7ca71e9b34fa6f413d1ed2b3dab
 Author: Adam Jackson <ajax@nwnk.net>
 Date:   Tue Mar 28 01:21:00 2006 +0000

 This undoes the workaround for X.org bug #964, which was an Xprintism.

 There's no sense verifying that we can create the lock file and then
 ignoring the return value from write.
Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Jamey Sharp <jamey@minilop.net>
 Backport to nx-libs: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>

nx-X11/lib/X11/imInsClbk.c: Fix warning 'right-hand operand of comma expression has no effect' in _XimFilterPropertyNotify.

 Backported from X.org, patch found in janitor cleanup commit...

 commit 8ba0ca32a63c532f128bdca7f1bf982cab8e12be
 Author: Paulo Cesar Pereira de Andrade <pcpa@mandriva.com.br>
 Date:   Wed Jan 28 20:31:42 2009 -0200

 Backported from X.org, patch found in janitor cleanup commit...

 commit 8ba0ca32a63c532f128bdca7f1bf982cab8e12be
 Author: Paulo Cesar Pereira de Andrade <pcpa@mandriva.com.br>
 Date:   Wed Jan 28 20:31:42 2009 -0200

 Backported from X.org (libX11). Host.c has mainly been copied over from
 libX11, contaning 7db7451 as the top commit (which also contains the
 greatest change and silences the resp. compiler warning.

 commit 7db74514e454d3fc4ff70aa08ddac66bfffda4dd
 Author: Alan Coopersmith <alan.coopersmith@oracle.com>
 Date:   Tue Jul 23 22:18:46 2013 -0700

    Refactor common code from XAddHost & XRemoveHost into single function

    On the Xlib side, the only real difference is the mode flag we send
    to the server with the address, so just make that an argument to the
    function with the common code for packing the address into the request.

    (Aside from labels, gcc 4.7.2 generates identical code before & after
     this change due to inlining, verified via diff of gcc -S output.)
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>

 "An experimental pseudocolor emulation layer.  Not fully completed,
 currently only works for 16bpp."  That was almost four years ago.
 It still doesn't work, only one driver even attempts to use it, it
 contains an ad-hoc implementation of damage, and should really be
 done up in Composite now anyway.

 Backport to nx-libs: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>

 There's no use for the values set through the various macro calls
 (fbGetDrawable and fbGetDrawablePixmap), so mark those variables as unused.

 The following warnings go away accordingly:
 |   CC     libfb_la-fb24_32.lo
 | fb24_32.c: In function 'fb24_32ReformatTile':
 | fb24_32.c:544:19: warning: variable 'newYoff' set but not used [-Wunused-but-set-variable]
 | fb24_32.c:544:10: warning: variable 'newXoff' set but not used [-Wunused-but-set-variable]
 | fb24_32.c:543:19: warning: variable 'oldYoff' set but not used [-Wunused-but-set-variable]
 | fb24_32.c:543:10: warning: variable 'oldXoff' set but not used [-Wunused-but-set-variable]
 |   CC     libfb_la-fbfill.lo
 | fbfill.c: In function 'fbFill':
 | fbfill.c:72:21: warning: variable 'stipYoff' set but not used [-Wunused-but-set-variable]
 | fbfill.c:72:11: warning: variable 'stipXoff' set but not used [-Wunused-but-set-variable]
 | fbfill.c:100:21: warning: variable 'stipYoff' set but not used [-Wunused-but-set-variable]
 | fbfill.c:100:11: warning: variable 'stipXoff' set but not used [-Wunused-but-set-variable]
 | fbfill.c:142:20: warning: variable 'tileYoff' set but not used [-Wunused-but-set-variable]
 | fbfill.c:142:10: warning: variable 'tileXoff' set but not used [-Wunused-but-set-variable]
 |   CC     libfb_la-fbgc.lo
 | fbgc.c: In function 'fbPadPixmap':
 | fbgc.c:92:19: warning: variable 'yOff' set but not used [-Wunused-but-set-variable]
 | fbgc.c:92:13: warning: variable 'xOff' set but not used [-Wunused-but-set-variable]
 | fbgc.c: In function 'fbCanEvenStipple':
 | fbgc.c:166:23: warning: variable 'stipYoff' set but not used [-Wunused-but-set-variable]
 | fbgc.c:166:13: warning: variable 'stipXoff' set but not used [-Wunused-but-set-variable]
 |   CC     libfb_la-fbpush.lo
 | fbpush.c: In function 'fbPushPixels':
 | fbpush.c:238:20: warning: variable 'stipYoff' set but not used [-Wunused-but-set-variable]
 | fbpush.c:238:10: warning: variable 'stipXoff' set but not used [-Wunused-but-set-variable]
Reviewed-by: Jeremy Huddleston <jeremyhu@apple.com>
Signed-off-by: Cyril Brulebois <kibi@debian.org>
 Backport to nx-libs: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>

Signed-off-by: Jeremy Huddleston <jeremyhu@apple.com>
Reviewed-by: Daniel Stone <daniel@fooishbar.org>
 Backport to nx-libs: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>

Xserver/xfixes/region.c: Don't declare and set PictureScreenPtr ps (in ProcXFixesSetPictureClipRegion). Variable is not used.

Attributes GH PR #142: https://github.com/ArcticaProject/nx-libs/pull/142
Reviewed by: Salvador Fandino <sfandino@yahoo.com>  -- Mon, 04 Jul 2016 16:31:00 +0200

test scripts: Add test scripts for testing Unix file socket support (i.e. proxy2proxy and proxy2agent sessions via Unix file sockets).