Properly enable/disable Xinerama support in nxagent via cmdline options provider in Xserver/os/utils.c.

  * Xinerama defaults to enabled, using RRXineramaExtension
    (i.e. cmdline option: +rrxinerama).
  * Cmdline option -rrxinerama disables Xinerama support entirely.
  * Cmdline option +xinerama switches from RRXineramaExtension to
    PanoramiXExtension.
  * Cmdline option -xinerama is actually non-functional (i.e. the
    default).
  * If the nx/nx option "xinerama" is handed over to nxagent,
    then Xinerama is only switched on if that given option enables it
    (value: 1) _and_ if either of the Xinerama extensions (PanoramiX
    or RRXinerama) has been initialized (via cmdline options above).

 Fixes ArcticaProject/nx-libs#117.
 Fixes ArcticaProject/nx-libs#134 (makes flawed PR#134 obsolete).

{nx-X11/programs/Xserver/hw/nxagent/{{Args,Handlers,Image,Options}.c,Options.h},nxcomp/{Loop,Misc}.cpp}: add configurable sleep delay if session is suspended.

nxagentReversePointerMap: Don't assume Xevent.xbutton.button is always greater than zero. We have seen Xevent.xbutton.button being set to AnyButton (equaling 0).

Fixes ArcticaProject/nx-libs#92
Fixes X2GoBTS#791

nx-X11/programs/Xserver/hw/nxagent/Handlers.h: fix stack smashing related to different data type sizes between Xserver and Xlib.

While on the X server side we were expecting a 32bit value, the Xlib side in
nxcompext wrote a 64bit integer to the 32bit location, hence overwriting
"random" data on the stack (most notably the return adress.)

We can work around this by using the Xlib-based Window data type on the
server-side as well, but this problem is likely a more general one.

Calling functions from libcompext in nxagent sounds like a bad idea. Other code
locations might well be affected by issues alike to that as well.

In order to silence compiler warnings, use a "macro hack" for overriding the
"Window" type in NXlib.h.

nx-X11/programs/Xserver: Include nxcomp{,ext,shad} headers like one would do with system-wide shared libraries.

nxcomp/Makefile.in: Only install MD5.h, NX.h, NXalert.h, NXpack.h, NXproto.h and NXvars.h as publicly available header files.

 * Also adapt debian/libxcomp-dev.install.in accordingly.
 * Also adapt nx-libs.spec accordingly.

 * Also adapt debian/libxcompshad-dev.install.in accordingly.
 * Also adapt nx-libs.spec accordingly.

nx-X11/programs/Xserver/Imakefile: Don't overlink nxagent. Linking against libXrandr and libXtst is not necessary for nxagent.

Fixes ArcticaProject/nx-libs#110.

nx-X11/config/cf/lnxLib.tmpl requires post-library removal cleanup: Drop references to dropped X11 extension client libraries.

Fixes ArcticaProject/nx-libs#115.

Attributes GH PR #106: https://github.com/ArcticaProject/nx-libs/pull/106

  include/extensions: Xag.h, Xagsrv.h, Xagstr.h
  Xserver/Xext: appgroup.c, appgroup.h
  lib/Xext: XAppgroup.c

  include/extensions: Xcup.h, Xcupstr.h,
  Xserver/Xext: cup.c
  lib/Xext: cup.c

  include/extensions: Xdbe.h
  Xserver/Xext: Xdbe.c

  Xserver/Xext:  dgaproc.h, xf86dga.c, xf86dga2.c, xf86dgaext.h

  include/extensions: Xevie.h, Xeviestr.h
  include/extensions: XEVI.h, XEVIstr.h
  Xserver/Xext: EVI.c, EVIstruct.h, sampleEVI.c
  lib/Xext: XEVI.c

  include/extensions: fontcache.h, fontcacheP.h, fontcachstr.h
  Xserver/Xext: fontcache.c

  include/extensions: lbxbuf.h, lbxbufstr.h, lbxdeltastr.h, lbximage.h, lbxopts.h, lbxstr.h, lbxzlib.h
  lib/Xext: XLbx.c

  include/extensions: multibuf.h, multibufst.h
  lib/Xext: XMultibuf.c
  Xserver/Xext: mbuf.c, mbufbf.c, mbufpx.c

  include/extensions: xf86vmode.h, xf86vmstr.h
  Xserver/Xext: vidmodeproc.h, xf86vmode.c

  lib/Xext: MITMisc.c
  Xserver/Xext: mitmisc.c

  Xserver/Xext: xf86misc.c, xf86miscproc.h

  Xserver/XTrap: xf86XTrapModule.c, xtrapddmi.c, xtrapdi.c, xtrapdiswp.c, xtrapditbl.c
  include/extensions: xtrapbits.h xtrapddmi.h xtrapdi.h xtrapemacros.h xtraplib.h xtraplibp.h xtrapproto.h
  Fixes: ArcticaProject/nx-libs#116
  X.org: https://cgit.freedesktop.org/xorg/xserver/commit/?id=cbc20d92de92aad5ca240310a9156ccf97c24a01

  Plus: Drop various Imake'ish defines where not needed anymore.

Fix debugging function for Loop.cpp. getDebugSpec was replaced by << operand in ChannelEndPoint.{h|cpp}, fixes #130

nx-X11/programs/Xserver/{hw/nxagent/NX,render/}picture.c: add and use new function ReduceCompositeOp().

More or less just an optimization for more "trivial" composite operations
requiring less work, but syncs up the newer X.Org Server and nx-libs a bit
more.

nx-X11/programs/Xserver/composite/Imakefile: add new file to SRCS and OBJS and define -DNXAGENT_SERVER while building the Composite extension to disable some code that depends upon a newer X.Org architecture.

misc nx-X11/{programs/Xserver/composite,include/extensions}: update to Composite 0.4 - with changes where neccessary and rough edges.

nx-X11/programs/Xserver/{dix/{colormap.c,window.c},hw/nxagent/NXwindow.c,include/{colormap,window{,str}}.h}: backport features needed for Composite 0.4.

nx-X11/programs/Xserver/{hw/nxagent/NX,render/}picture.c: add and use new function ReduceCompositeOp().

More or less just an optimization for more "trivial" composite operations
requiring less work, but syncs up the newer X.Org Server and nx-libs a bit
more.

nx-X11/programs/Xserver/composite/Imakefile: add new file to SRCS and OBJS and define -DNXAGENT_SERVER while building the Composite extension to disable some code that depends upon a newer X.Org architecture.

misc nx-X11/{programs/Xserver/composite,include/extensions}: update to Composite 0.4 - with changes where neccessary and rough edges.

nx-X11/programs/Xserver/{dix/{colormap.c,window.c},hw/nxagent/NXwindow.c,include/{colormap,window{,str}}.h}: backport features needed for Composite 0.4.

Attributes GH PR #102: https://github.com/ArcticaProject/nx-libs/pull/102

 Amends the following compiler warning

 Display.c: In function ‘nxagentMakeIcon’:
 Display.c:1949:18: warning: assignment from incompatible pointer type
      agentIconData=x2goagentIconData;
                  ^
 Display.c:1954:18: warning: assignment from incompatible pointer type
      agentIconData=nxagentIconData;
                  ^
 Display.c:2001:41: warning: passing argument 3 of ‘XpmCreatePixmapFromData’ from incompatible pointer type
                                          agentIconData,
                                          ^
 In file included from Icons.h:22:0,
                  from Display.c:67:
 X11/include/xpm_nxagent.h:242:6: note: expected ‘char **’ but argument is of type ‘char *’
  FUNC(XpmCreatePixmapFromData, int, (Display *display,
       ^
 X11/include/xpm_nxagent.h:230:32: note: in definition of macro ‘FUNC’
  #define FUNC(f, t, p) extern t f p