Xserver/os/xprintf.c: Drop NoMachine's own implementation of Xvasprintf(). Use stock implementation instead.

 * Reason from NoMachine's NX CHANGELOG for having its own implementation
   of Xvasprintf() (from around nxagent 3.3.0):

    - Fixed TR06G02225. The implementation of Xvprintf() has been reviewed
      to work on more platforms. Previous implementation caused a failure
      in the build of keyboard map on some platform like Solaris 8 and 9.
    - Fixed TR03G02198. Reimplemented Xvprintf() in Xserver/os to handle
      the case in which vsnprintf returned -1.

 * Reason for removing it again:

    - Fixes segfaults in SetDefaultFontPath when launching nxagent.
    - All locations in Xserver/** using the code check for return value
      of -1.
    - Solaris 8 and 9 are beyond of our support scope.
    - Keep more in sync with X.org.
    - Good moment to drop more GPL-2 code from Xserver's code base.

nx-X11/programs/Xserver/os/xprintf.c: remove doubly-defined Xscnprintf function, add missing header includes.

Fix up for 1e3a9748, which has been
faulty in this regard.

Attributes GH PR #592: https://github.com/ArcticaProject/nx-libs/pull/592

Backported from X.org:

commit 5c2e2a164d615ab06be28a663734e782614b5cc7
Author: Daniel Kurtz <djkurtz@chromium.org>
Date:   Wed Apr 18 09:51:51 2012 +0000

    os/xprintf: add Xvscnprintf and Xscnprintf

    Normal snprintf() usually returns the number of bytes that would have been
    written into a buffer had the buffer been long enough.

    The scnprintf() variants return the actual number of bytes written,
    excluding the trailing '\0'.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Backported-to-NX-by: Mihai Moldovan <ionic@ionic.de>

Backported from X.org:

commit 1324b0ca9f8a7fdaf03b374c75eb3c9df407c2f1
Author: Colin Harrison <colin.harrison@virgin.net>
Date:   Fri Dec 10 00:08:24 2010 +0000

    Typo in xserver Xvasprintf()

    I needed this patch in the wrapper around vsnprintf() in os/xprintf.c
    (MinGW for Windows build) to correct various crashes.
Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Backported-to-NX-by: Mihai Moldovan <ionic@ionic.de>

Backported from X.org:

commit c95c1d338fdb62dbe3dba934b97324fa778b7fce
Author: Alan Coopersmith <alan.coopersmith@oracle.com>
Date:   Sat Nov 27 18:43:12 2010 -0800

    Add asprintf() implementation for platforms without it

    Provides a portable implementation of this common allocating sprintf()
    API found in many, but not yet all, of the platforms we support.
    If the platform provides vasprintf() we simply wrap it, otherwise we
    implement it - either way callers can use it regardless of platform.

    Since not all platforms guarantee to NULL out the return pointer on
    failure, we don't either, and require callers to check the return
    value for -1.

    The old Xprintf() API is deprecated, but left for compatibility for now.

    The new API is added in a new header so that it can be used in parts of
    the server such as hw/xfree86/parser that don't include all the server
    headers.
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Reviewed-by: Mikhail Gusarov <dottedmag@dottedmag.net>

Includes re-indentation changes from
9838b7032ea9792bec21af424c53c07078636d21.
Backported-to-NX-by: Mihai Moldovan <ionic@ionic.de>

Attributes GH PR #575: https://github.com/ArcticaProject/nx-libs/pull/575

Fixes: ArcticaProject/nx-libs#569
Fixes: ArcticaProject/nx-libs#573

Should be used instead of free() calls and will clear the pointer after
calling free(). This can prevent double-free or use-after-free errors.

The thread specific stringstream objects on the stack need to be
deleted, not just pop()ed.

Fixes ArcticaProject/nx-libs#573 (partially)

free() can handle NULL itself

Fixes ArcticaProject/nx-libs#569

Attributes GH PR #582: https://github.com/ArcticaProject/nx-libs/pull/582

nxagent will abort if it encounters an unknown command line option. As
we want 3.6 to be a drop-in replacement for 3.5 we cannot simply drop old
options but must accept them as no-op.

Attributes GH PR #588: https://github.com/ArcticaProject/nx-libs/pull/588

Fixes: ArcticaProject/nx-libs#585

It is called only if DEBUG_TREE is defined.

Fixes ArcticaProject/nx-libs#585

Attributes GH PR #581: https://github.com/ArcticaProject/nx-libs/pull/581

Fixes: ArcticaProject/nx-libs#558
Fixes: ArcticaProject/nx-libs#541
Fixes: ArcticaProject/nx-libs#542

Backported from X.org:

   commit 512bac25ec0e980968b93a2ebe88bd89bf99b697
   Author: Daniel Stone <daniel@fooishbar.org>
   Date:   Tue Nov 6 14:52:03 2007 +0000

    DIX: XKB: Set xkbInfo to NULL as well as freeing it (bug # 10639)

    XkbRemoveResourceClient wants to access xkbInfo if it exists, so make
    sure we NULL it after freeing it.  It doesn't make much sense to move
    the RemoveResourceClient call first, as there's not much point in
    notifying clients while we're shutting the server down anyway.
Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>

Backported from X.Org:

   commit 1cfa9f647e0241f4b9e56556b128d7bfd987eaca
   Author: Daniel Stone <daniel@fooishbar.org>
   Date:   Tue Feb 28 16:55:26 2006 +0000

   Bug # 5216: Allow options to appear with other components.
Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>

Backported from X.Org:

    commit 0693083335185ce05ee64546151f3fc43ce98575
    Author: Lars Knoll <lars@trolltech.com>
    Date:   Mon Mar 6 21:00:09 2006 +0000

    render/picture.c Correctly initialize devPrivates variable in source only
        pictures to 0
    miext/cw/cw.h Don't try to access devPrivates of source only pictures
Backported-from-NX-by: Ulrich Sibiller <uli42@gmx.de>

Backported from X.org:

   Commit 6bb2dc02a7cffd6ed7dd28e88d584920a4150749
   Author: Adam Jackson <ajax@nwnk.net>
   Date:   Wed Mar 15 16:01:47 2006 +0000

   Coverity # 337: Remove useless NULL check.
Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>

Backported from X.org:

   commit 72cc6307257fcbb800267464487bf918ee674328
   Author: Adam Jackson <ajax@nwnk.net>
   Date:   Wed Mar 15 16:32:05 2006 +0000

   Coverity # 491: Check version number correctly.
Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>

Backported from X.org:

   commit 152090ce442e94de1ae920208a92931af6493c8c
   Author: Adam Jackson <ajax@nwnk.net>
   Date:   Wed Mar 15 16:33:12 2006 +0000

   Coverity # 487: Check version number correctly.
Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>

Fixes ArcticaProject/nx-libs#542

Backported from X.org:

   commit 5e106a71b9f8077216d41619402952b0005dd8a4
   Author: Adam Jackson <ajax@nwnk.net>
   Date:   Wed Mar 15 16:49:04 2006 +0000

   Coverity # 807: Fix a memory leak in XFixesExpandRegion.
Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>

Fixes ArcticaProject/nx-libs#541

Backported from X.org:

   commit fc7fb5bbe1c8f787e53500b9a2ca4af815f310d1
   Author: Giuseppe Bilotta giuseppe.bilotta@gmail.com
   Date: Thu Nov 9 10:21:21 2017 +0100

   randr: free crtc->outputs on destroy
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Giuseppe Bilotta <giuseppe.bilotta@gmail.com>
Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>

Fixes ArcticaProject/nx-libs#558

Backported from X.org:

   commit 16381d186e7c791031392ed8afcfd33009854e9e
   Author: Giuseppe Bilotta giuseppe.bilotta@gmail.com
   Date: Thu Nov 9 10:21:20 2017 +0100

   randr: always realloc crtcs and outputs

   When the last crtc (resp. output) is destroyed, the rrScrPriv crtcs
   (resp. outputs) fields do not get cleared, which can lead to a situation
   where the private's numCrtcs (resp. numOutputs) field is zero, but the
   associated memory is still allocated. Just checking if numCrtcs (resp.
   numOutputs) is zero is thus not a good criteria to determine whetehr to
   use a realloc or a malloc.

   Since crtcs (resp. outputs) are NULL-initialized anyway, relying on
   numCrtcs (resp. numOutputs) is actually unnecessary, because
   reallocation of a NULL ptr is equivalent to a malloc anyway.

   Therefore, just use realloc() unconditionally, and ensure that the
   fields are properly initialized.
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Giuseppe Bilotta <giuseppe.bilotta@gmail.com>
Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>

Fixes ArcticaProject/nx-libs#558

Attributes GH PR #578: https://github.com/ArcticaProject/nx-libs/pull/578

Attributes GH PR #562: https://github.com/ArcticaProject/nx-libs/pull/562

Fixes: ArcticaProject/nx-libs#546
Fixes: ArcticaProject/nx-libs#547

 Fixes ArcticaProject/nx-libs#547.

 Fixes ArcticaProject/nx-libs#546.

Attributes GH PR #579: https://github.com/ArcticaProject/nx-libs/pull/579