There might be some library linking missing on platforms that deliver
timingsafe_memcmp but I cannot test that here.

Fixes ArcticaProject/nx-libs#365

These two commits:

   commit 5c44169caed811e59a65ba346de1cadb46d266ec
   Author: Adam Jackson <ajax@redhat.com>
   Date:   Thu Mar 2 17:20:30 2017 -0500

       os: Squash missing declaration warning for timingsafe_memcmp

       timingsafe_memcmp.c:21:1: warning: no previous prototype for ‘timingsafe_memcmp’ [-Wmissing-prototypes]
        timingsafe_memcmp(const void *b1, const void *b2, size_t len)
Signed-off-by: Adam Jackson <ajax@redhat.com>

   commit d7ac755f0b618eb1259d93c8a16ec6e39a18627c
   Author: Matthieu Herrb <matthieu@herrb.eu>
   Date:   Tue Feb 28 19:18:25 2017 +0100

       Use timingsafe_memcmp() to compare MIT-MAGIC-COOKIES CVE-2017-2624

       Provide the function definition for systems that don't have it.
Signed-off-by: Matthieu Herrb <matthieu@herrb.eu>

Attributes GH PR #359: https://github.com/ArcticaProject/nx-libs/pull/359

This is basically a backport of the following commits + replacing
xalloc/xfree by malloc/free. Fixes ArcticaProject/nx-libs#358.

   commit 2761c103311a1160bc483fd0367d654733df8598
   Author: Daniel Stone <daniel@fooishbar.org>
   Date:   Mon Nov 5 14:03:26 2007 +0000

       OS: Remove usage of alloca

       Replace with heap allocations.

   commit 5e363500c86042c394595e1a6633581eb8fcd1bb
   Author: Daniel Stone <daniel@fooishbar.org>
   Date:   Mon Nov 5 14:38:28 2007 +0000

       OS: Remove ALLOCATE_LOCAL from os.h

       Remove ALLOCATE_LOCAL_FALLBACK and DEALLOCATE_LOCAL_FALLBACK from os.h, and
       remove the include of Xalloca.h as well.

Attribute GH PR #369: https://github.com/ArcticaProject/nx-libs/pull/369

this was missing from the backport of
5623c27700b7b23a8dbbd8c8f45e5d4fa0c667e3 (Constify atom name strings)

XKB really XKBdoes not XKBneed its own XKBdefines for XKBeverything.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Fernando Carrijo <fcarrijo@yahoo.com.br>
Signed-off-by: Keith Packard <keithp@keithp.com>
Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>

The two functions have identical semantics, including safely returning
NULL when NULL is passed in (which POSIX strdup does not guarantee).

Some callers could probably be adjusted to call libc strdup directly,
when we know the input is non-NULL.
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Daniel Stone <daniel@fooishbar.org>
Backported-to-NX-by: Ulrich Sibiller <uli42@gmx.de>

Because of validateString being a macro NameForAtom was called twice most of the time.

Fix that by making validateString a function.

Fixes ArticaProject/nx-libs#357

This is basically a backport of the following commits + replacing
xalloc/xfree by malloc/free. Fixes ArcticaProject/nx-libs#358.

   commit 2761c103311a1160bc483fd0367d654733df8598
   Author: Daniel Stone <daniel@fooishbar.org>
   Date:   Mon Nov 5 14:03:26 2007 +0000

       OS: Remove usage of alloca

       Replace with heap allocations.

   commit 5e363500c86042c394595e1a6633581eb8fcd1bb
   Author: Daniel Stone <daniel@fooishbar.org>
   Date:   Mon Nov 5 14:38:28 2007 +0000

       OS: Remove ALLOCATE_LOCAL from os.h

       Remove ALLOCATE_LOCAL_FALLBACK and DEALLOCATE_LOCAL_FALLBACK from os.h, and
       remove the include of Xalloca.h as well.

Attributes GH PR #318: https://github.com/ArcticaProject/nx-libs/pull/318

 Fixes ArcticaProject/nx-libs#237.

Xserver/Xext/shmint.h: Provide header file exporting ShmRegisterFunc and ShmRegisterFbFuncs (plus ShmSetPixmapFormat as a by-product).

 commit 9ceffb6b92e55f0d74d71489900d43940f14dfd9
 Author: Eric Anholt <anholt@freebsd.org>
 Date:   Wed Dec 28 10:37:17 2005 +0000

    Merge from xserver a header for shm's server internal functions, which are
        called by DDXes. Desired by XGL, and should be used in other locations,
        probably.
Backported-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>

Attributes GH PR #310: https://github.com/ArcticaProject/nx-libs/pull/310

Fixes: ArcticaProject/nx-libs#265.

 - Support for i18n in libNX_X11 is static only, has ever been.
 - Thus, the files XlcSL.[co], XlcDL.[co], XDefaultIMIF.[co],
   XDefaultOMIF.[co] and lcDynamic.[co] become obsolete.

doc/libNX_X11/lcUniConv: Move over the rather-documentary files 8bit_tab_to_h.c and cjk_tab_to_h.c to nx-libs's doc/ folder.

doc/libNX_X11/lcUniConv: Pull over README from X.org's libX11 to document the origin and purpose of 8bit_tab_to_h.c and cjk_tab_to_h.c.

Attributes GH PR #374: https://github.com/ArcticaProject/nx-libs/pull/374

 Fixes ArcticaProject/nx-libs#324.

misc nx-X11/programs/Xserver/{composite,dix,randr}/: switch to using reallocarray, since it has been ported now.

nx-X11/{config/cf/{{Imake,X11}.tmpl,linux.cf},programs/Xserver/{include/os.h,os/{Imakefile,reallocarray.c}}: backport reallocarray() implementation.

misc nx-X11/programs/Xserver/{hw/nxagent,miext,render}/: move code around so that we can drop nx-X11/programs/Xserver/render/miglyph.c (and by extension nx-X11/programs/Xserver/hw/nxagent/NXmiglyph.c.)

This is essentially a bastardized cross/backport of these X.Org commits - based
on our current architecture:

commit 4b14c9a9cd2033d3839c4ba364d41ab4c4b198ab
Author: Eric Anholt <eric@anholt.net>
Date:   Fri Oct 19 16:34:54 2007 -0700

    Replace calls to Glyphs screen hook with CompositeGlyphs and remove dead code.

    Not all of the DDX/miext Glyphs hook implementations have been removed, but
    they should be.

and

commit 2251572062b2c25643671b8d5070de1c3f7ae976
Author: Aaron Plattner <aplattner@nvidia.com>
Date:   Fri Oct 26 15:13:50 2007 -0700

    Restore the CompositeGlyphs -> ps->Glyphs -> miGlyphs callchain to allow acceleration architectures to wrap above miGlyphs.

Conflicts:
	nx-X11/programs/Xserver/render/miglyph.c
	nx-X11/programs/Xserver/render/mipict.h
	nx-X11/programs/Xserver/render/picture.c

nx-X11/programs/Xserver/mi/{Imakefile,mibank.{c,h}}: backport ffaae7c0c69a51a53a76146c79f3630ae197a443.

 Down with mibank!

 Fixes ArcticaProject/nx-libs#366.

Attributes GH PR #375: https://github.com/ArcticaProject/nx-libs/pull/375

Reviewed-by: Ulrich Sibiller <uli42@gmx.de>  -- Fri, 03 Mar 2017 02:20:38 -0800

 Fixes ArcticaProject/nx-libs#328.

 Fixes ArcticaProject/nx-libs#325.
 Fixes ArcticaProject/nx-libs#326.

Attribute GH PR #360: https://github.com/ArcticaProject/nx-libs/pull/360

Attributes GH PR #314: https://github.com/ArcticaProject/nx-libs/pull/314

Fixes: ArcticaProject/nx-libs#51.

nxcomp/Loop.cpp: Ignore, options= nx/nx parameter, if file options path starts with /dev/, /proc/, or /sys/.

 Partially resolved ArcticaProject/nx-libs#51.

Attributes GH PR #363: https://github.com/ArcticaProject/nx-libs/pull/363

 Inspired by X.org commits:

 commit 08093c25a91c07ab8af7cece9bba738b827cfd1b
 Author: Alan Coopersmith <alan.coopersmith@oracle.com>
 Date:   Mon Oct 24 23:16:30 2011 -0700

    Convert some malloc + strncpy pairs into strndup calls
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Reviewed-by: Jeremy Huddleston <jeremyhu@apple.com>

 commit 816b79dd061e9839cec94a4986a7820b70ca8a7f
 Author: Mikhail Gusarov <dottedmag@dottedmag.net>
 Date:   Thu May 13 03:45:21 2010 +0700

    Remove useless casts
Signed-off-by: Mikhail Gusarov <dottedmag@dottedmag.net>
Reviewed-by: Keith Packard <keithp@keithp.com>

 This PR ships a tiny change in MakeAtom, that we adopted.
 We did not adopt the full commit.

 commit 5623c27700b7b23a8dbbd8c8f45e5d4fa0c667e3
 Author: Alan Coopersmith <alan.coopersmith@sun.com>
 Date:   Mon Feb 2 19:25:14 2009 -0800

    Constify atom name strings

    Changes MakeAtom to take a const char * and NameForAtom to return them,
    since many callers pass pointers to constant strings stored in read-only
    ELF sections.   Updates in-tree callers as necessary to clear const
    mismatch warnings introduced by this change.
Signed-off-by: Alan Coopersmith <alan.coopersmith@sun.com>
Acked-by: Peter Hutterer <peter.hutterer@who-t.net>
Backported-to-NX-by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>

Attributes GH PR #311: https://github.com/ArcticaProject/nx-libs/pull/311