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>