sync code with last improvements from OpenBSD

lib/libXRes/configure.ac

@@ -0,0 +1,57 @@
+#
+#  Copyright © 2003 Keith Packard, Noah Levitt
+#
+#  Permission to use, copy, modify, distribute, and sell this software and its
+#  documentation for any purpose is hereby granted without fee, provided that
+#  the above copyright notice appear in all copies and that both that
+#  copyright notice and this permission notice appear in supporting
+#  documentation, and that the name of Keith Packard not be used in
+#  advertising or publicity pertaining to distribution of the software without
+#  specific, written prior permission.  Keith Packard makes no
+#  representations about the suitability of this software for any purpose.  It
+#  is provided "as is" without express or implied warranty.
+#
+#  KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+#  INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+#  EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+#  CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+#  DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+#  TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+#  PERFORMANCE OF THIS SOFTWARE.
+#
+
+# Initialize Autoconf
+AC_PREREQ([2.60])
+#
+# Version should match the current XRes version. XResQueryVersion
+# returns the version from XResproto.h, NOT the version we set here. But we
+# try to keep these the same.  Note that the library has an extra
+# digit in the version number to track changes which don't affect the
+# protocol, so XRes version l.n.m corresponds to protocol version l.n
+#
+AC_INIT([libXres], [1.2.2],
+        [https://gitlab.freedesktop.org/xorg/lib/libxres/-/issues], [libXres])
+AC_CONFIG_SRCDIR([Makefile.am])
+AC_CONFIG_HEADERS([config.h])
+
+# Initialize Automake
+AM_INIT_AUTOMAKE([foreign dist-xz])
+
+# Initialize libtool
+AC_PROG_LIBTOOL
+
+# Require X.Org macros 1.8 or later for MAN_SUBSTS set by XORG_MANPAGE_SECTIONS
+m4_ifndef([XORG_MACROS_VERSION],
+	  [m4_fatal([must install xorg-macros 1.8 or later before running autoconf/autogen])])
+XORG_MACROS_VERSION(1.8)
+XORG_DEFAULT_OPTIONS
+XORG_CHECK_MALLOC_ZERO
+
+# Obtain compiler/linker options for dependencies
+PKG_CHECK_MODULES(XRES, [x11 >= 1.6] xext xextproto [resourceproto >= 1.2.0])
+
+AC_CONFIG_FILES([Makefile
+		src/Makefile
+		man/Makefile
+		xres.pc])
+AC_OUTPUT