nx-X11/programs/Xserver/hw/nxagent/Display.c: use new ReconnectTolerance nxagentOption in nxagentCheckForDefaultDepthCompatibility() and modify behavior based on this value.

Recognized values:
  - Strict means that the old and new default depth values
    must match exactly.
  - Safe or Risky means that the default depth values
    might differ, but the new default depth value must be at
    least as high as the former default depth value. This is
    recommended, because it allows clients with a
    higher default depth value to still connect, but
    not lose functionality.
  - Bypass or higher means that all of these checks are
    essentially deactivated. This is probably a very
    bad idea.

Note that the default ReconnectTolerance value is still Strict.

{nx-X11/programs/Xserver/hw/nxagent/{Args.c,Options.{c,h}},nxcomp/{Loop,Misc}.cpp}: add tolerancechecks parameter as an nx/nx option and ReconnectTolerance as an nxagentOption.

Attributes GH PR #189: https://github.com/ArcticaProject/nx-libs/pull/189

Attributes GH PR #182: https://github.com/ArcticaProject/nx-libs/pull/182
Reviewed by: Nicolas Arenas <narenas@qindel.com>  -- Tue, 05 Jul 2016 06:15:57 -0700
Reviewed by: Mihai Moldovan <ionic@ionic.de>  -- Tue, 05 Jul 2016 09:40:04 -0700
Reviewed by: Ulrich Sibiller <uli42@gmx.de>  -- Tue, 05 Jul 2016 13:57:05 -0700

:44:48 -0700
Reviewed by: Ulrich Sibiller <uli42@gmx.de>  -- Tue, 05 Jul 2016 13:57:05 -0700

 This has already been started while replacing copyright info in file
 headers and has now been completed with this commit.

Per-file copyright notices: Update copyright information in file headers that NoMachine placed there own copyright statement in.

remove NEED_EVENTS/NEED_REPLIES

Remove defines of NEED_EVENTS and NEED_REPLIES because they are never
used anywhere.

Basically these three commits, but as they are newer and to not match
the code structure the patches have not been applied but replaced by
sed + manual intervention:

   From cb95642dc8edebb2935dd471f8b339cb98aa8481 Mon Sep 17 00:00:00 2001
   From: Peter Hutterer <peter.hutterer@redhat.com>
   Date: Fri, 28 Nov 2008 22:28:32 +1000
   Subject: Remove #define NEED_EVENTS and NEED_REPLIES

   A grep on xorg/* revealed there's no consumer of this define.

   Quote Alan Coopersmith:
   "The consumer was in past versions of the headers now located
   in proto/x11proto - for instance, in X11R6.0's xc/include/Xproto.h,
   all the event definitions were only available if NEED_EVENTS were
   defined, and all the reply definitions required NEED_REPLIES.

   Looks like Xproto.h dropped them by X11R6.3, which didn't have
   the #ifdef's anymore, so these are truly ancient now."
Signed-off-by: Peter Hutterer <peter.hutterer@redhat.com>
Signed-off-by: Adam Jackson <ajax@redhat.com>

--

   From 6de368c9aa7ccd2fcd62fca5a2b278913db4d03d Mon Sep 17 00:00:00 2001
   From: Fernando Carrijo <fcarrijo@yahoo.com.br>
   Date: Thu, 1 Jul 2010 06:50:47 -0300
   Subject: Purge macros NEED_EVENTS and NEED_REPLIES
Signed-off-by: Fernando Carrijo <fcarrijo@yahoo.com.br>
Acked-by: Tiago Vignatti <tiago.vignatti@nokia.com>
Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com>

--

   From 57c03e52e6b4e3ed54df5fdd778865467d08e119 Mon Sep 17 00:00:00 2001
   From: Fernando Carrijo <fcarrijo@yahoo.com.br>
   Date: Thu, 1 Jul 2010 06:59:48 -0300
   Subject: Purge macro NEED_EVENTS
Signed-off-by: Fernando Carrijo <fcarrijo@yahoo.com.br>
Acked-by: Tiago Vignatti <tiago.vignatti@nokia.com>
Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com>

debian/nxproxy.docs: Fix FTBFS due to missing documentation files (moved out of the way with recent commits).

Attributes GH PR #178: https://github.com/ArcticaProject/nx-libs/pull/178
Reviewed by: Vadim Troshchinskiy <vadim@qindel.com> --  Tue, 05 Jul 2016 02:37:08 -0700

 Casting return to (void) was used to tell lint that you intended
 to ignore the return value, so it didn't warn you about it.

 Casting the third argument to (char *) was used as the most generic
 pointer type in the days before compilers supported C89 (void *)
 (except for a couple places it's used for byte-sized pointer math).
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Reviewed-by: Keith Packard <keithp@keithp.com>
Tested-by: Daniel Stone <daniel@fooishbar.org>
 Backport to nx-libs: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>

 Enough with the casting.  Doesn't break API or even ABI, but does make
 a lot of silly casts superfluos.

Xserver.man: Drop original and old Xserver man page. Relevant parts have now been added to nxagent.1 man page.

 Drop other LICENSE files added by NoMachine scattered all over the code tree.

 One COPYING file in the project's base folder is sufficient.

doc/_attic_/: Introduce an "_attic_" folder. Move diffs between NoMachine's nx-X11 3.5 and X.org 6.9 here.