libcompat: Update gettext.h from gettext 0.17

This changes its license from LGPL2+ to GPL2+.

lib/compat/gettext.h

@@ -2,7 +2,7 @@
    Copyright (C) 1995-1998, 2000-2002, 2004-2006 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or modify it
-   under the terms of the GNU Library General Public License as published
+   under the terms of the GNU General Public License as published
    by the Free Software Foundation; either version 2, or (at your option)
    any later version.
 
@@ -11,7 +11,7 @@
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Library General Public License for more details.
 
-   You should have received a copy of the GNU Library General Public
+   You should have received a copy of the GNU General Public
    License along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
    USA.  */
@@ -65,17 +65,22 @@
    On pre-ANSI systems without 'const', the config.h file is supposed to
    contain "#define const".  */
 # define gettext(Msgid) ((const char *) (Msgid))
-# define dgettext(Domainname, Msgid) ((const char *) (Msgid))
-# define dcgettext(Domainname, Msgid, Category) ((const char *) (Msgid))
+# define dgettext(Domainname, Msgid) ((void) (Domainname), gettext (Msgid))
+# define dcgettext(Domainname, Msgid, Category) \
+    ((void) (Category), dgettext (Domainname, Msgid))
 # define ngettext(Msgid1, Msgid2, N) \
-    ((N) == 1 ? (const char *) (Msgid1) : (const char *) (Msgid2))
+    ((N) == 1 \
+     ? ((void) (Msgid2), (const char *) (Msgid1)) \
+     : ((void) (Msgid1), (const char *) (Msgid2)))
 # define dngettext(Domainname, Msgid1, Msgid2, N) \
-    ((N) == 1 ? (const char *) (Msgid1) : (const char *) (Msgid2))
+    ((void) (Domainname), ngettext (Msgid1, Msgid2, N))
 # define dcngettext(Domainname, Msgid1, Msgid2, N, Category) \
-    ((N) == 1 ? (const char *) (Msgid1) : (const char *) (Msgid2))
+    ((void) (Category), dngettext(Domainname, Msgid1, Msgid2, N))
 # define textdomain(Domainname) ((const char *) (Domainname))
-# define bindtextdomain(Domainname, Dirname) ((const char *) (Dirname))
-# define bind_textdomain_codeset(Domainname, Codeset) ((const char *) (Codeset))
+# define bindtextdomain(Domainname, Dirname) \
+    ((void) (Domainname), (const char *) (Dirname))
+# define bind_textdomain_codeset(Domainname, Codeset) \
+    ((void) (Domainname), (const char *) (Codeset))
 
 #endif
 
@@ -165,7 +170,8 @@ npgettext_aux (const char *domain,
 #include <string.h>
 
 #define _LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS \
-  (__GNUC__ >= 3 || __GNUG__ >= 2 /* || __STDC_VERSION__ >= 199901L */ )
+  (((__GNUC__ >= 3 || __GNUG__ >= 2) && !__STRICT_ANSI__) \
+   /* || __STDC_VERSION__ >= 199901L */ )
 
 #if !_LIBGETTEXT_HAVE_VARIABLE_SIZE_ARRAYS
 #include <stdlib.h>