[gdm] Remove obsolete references to XNEST from the build system

[Ray Strode <halfline src gnome org>]

commit ce2ef875cae926ea7d07ca55eef802d9a6c4e033
Author: Laurent Bigonville <bigon bigon be>
Date:   Mon Apr 4 03:39:25 2016 +0200

    Remove obsolete references to XNEST from the build system
    
    https://bugzilla.gnome.org/show_bug.cgi?id=764567

 acconfig.h       |    3 ---
 configure.ac     |   37 -------------------------------------
 data/Makefile.am |    3 ---
 3 files changed, 0 insertions(+), 43 deletions(-)
---
diff --git a/acconfig.h b/acconfig.h
index c8a1d96..214b409 100644
--- a/acconfig.h
+++ b/acconfig.h
@@ -39,9 +39,6 @@
 #undef HAVE_XINPUT
 #undef X_SERVER
 #undef X_SERVER_PATH
-#undef X_XNEST_CMD
-#undef X_XNEST_CONFIG_OPTIONS
-#undef X_XNEST_UNSCALED_FONTPATH
 #undef X_CONFIG_OPTIONS
 #undef X_PATH
 #undef XSESSION_SHELL
diff --git a/configure.ac b/configure.ac
index c02626b..434cade 100644
--- a/configure.ac
+++ b/configure.ac
@@ -350,7 +350,6 @@ AC_CHECK_HEADERS(sys/vt.h)
 
 EXTRA_DAEMON_LIBS=""
 EXTRA_CHOOSER_LIBS=""
-EXTRA_XNEST_LIBS=""
 EXTRA_FLEXI_LIBS=""
 EXTRA_DYNAMIC_LIBS=""
 EXTRA_SETUP_LIBS=""
@@ -360,7 +359,6 @@ AC_CHECK_FUNC(socket,,[
              AC_CHECK_LIB(socket,socket, [
                           EXTRA_DAEMON_LIBS="$EXTRA_DAEMON_LIBS -lsocket"
                           EXTRA_CHOOSER_LIBS="$EXTRA_CHOOSER_LIBS -lsocket"
-                          EXTRA_XNEST_LIBS="$EXTRA_XNEST_LIBS -lsocket"
                           EXTRA_FLEXI_LIBS="$EXTRA_FLEXI_LIBS -lsocket"
                           EXTRA_DYNAMIC_LIBS="$EXTRA_DYNAMIC_LIBS -lsocket"
                           EXTRA_SETUP_LIBS="$EXTRA_SETUP_LIBS -lsocket"
@@ -1199,7 +1197,6 @@ fi
 #
 AC_SUBST(EXTRA_DAEMON_LIBS)
 AC_SUBST(EXTRA_CHOOSER_LIBS)
-AC_SUBST(EXTRA_XNEST_LIBS)
 AC_SUBST(EXTRA_FLEXI_LIBS)
 AC_SUBST(EXTRA_DYNAMIC_LIBS)
 AC_SUBST(EXTRA_SETUP_LIBS)
@@ -1282,33 +1279,6 @@ if $PKG_CONFIG --atleast-version=1.17 xorg-server; then
 fi
 
 dnl ---------------------------------------------------------------------------
-dnl - Check for Xnest / Xephyr support
-dnl ---------------------------------------------------------------------------
-
-# Use Xephyr if it is available.  It works better than Xnest since Xephyr
-# supports the Xserver extensions, even if on a remote machine.
-#
-X_XNEST_UNSCALED_FONTPATH="true"
-if test -x $X_SERVER_PATH/Xephyr; then
-    X_XNEST_CMD="$X_SERVER_PATH/Xephyr"
-    X_XNEST_CONFIG_OPTIONS="-audit 0"
-else
-    if test -x /usr/openwin/bin/Xnest; then
-        # If on Solaris, Xnest is only shipped with the Xsun Xserver, so
-        # use this version.
-        #
-        X_XNEST_CMD="/usr/openwin/bin/Xnest"
-        X_XNEST_CONFIG_OPTIONS="-audit 0 -name Xnest -pn"
-        X_XNEST_UNSCALED_FONTPATH="false"
-    else
-        if test -x $X_SERVER_PATH/Xnest; then
-            X_XNEST_CMD="$X_SERVER_PATH/Xnest"
-            X_XNEST_CONFIG_OPTIONS="-audit 0 -name Xnest"
-        fi
-    fi
-fi
-
-dnl ---------------------------------------------------------------------------
 dnl - Expand vars
 dnl ---------------------------------------------------------------------------
 
@@ -1554,13 +1524,6 @@ AC_SUBST(X_SERVER_PATH)
 AC_DEFINE_UNQUOTED(X_SERVER,"$X_SERVER",[])
 AC_DEFINE_UNQUOTED(X_SERVER_PATH,"$X_SERVER_PATH",[])
 
-AC_SUBST(X_XNEST_CMD)
-AC_SUBST(X_XNEST_CONFIG_OPTIONS)
-AC_SUBST(X_XNEST_UNSCALED_FONTPATH)
-AC_DEFINE_UNQUOTED(X_XNEST_CMD,"$X_XNEST_CMD",[])
-AC_DEFINE_UNQUOTED(X_XNEST_CONFIG_OPTIONS,"$X_XNEST_CONFIG_OPTIONS",[])
-AC_DEFINE_UNQUOTED(X_XNEST_UNSCALED_FONTPATH,"$X_XNEST_UNSCALED_FONTPATH",[])
-
 ## Stuff for debian/changelog.in
 #if test -e "debian/changelog"; then
 #  DEBIAN_DATESTAMP=`head -1 debian/changelog| sed -e 's/.*cvs.//' -e 's/).*//'`
diff --git a/data/Makefile.am b/data/Makefile.am
index 93c0386..a47e790 100644
--- a/data/Makefile.am
+++ b/data/Makefile.am
@@ -72,9 +72,6 @@ gdm.schemas.in: $(srcdir)/gdm.schemas.in.in
                -e 's,[@]ALWAYS_RESTART_SERVER[@],$(ALWAYS_RESTART_SERVER),g' \
                -e 's,[@]X_CONFIG_OPTIONS[@],$(X_CONFIG_OPTIONS),g' \
                -e 's,[@]X_SERVER[@],$(X_SERVER),g' \
-               -e 's,[@]X_XNEST_CMD[@],$(X_XNEST_CMD),g' \
-               -e 's,[@]X_XNEST_CONFIG_OPTIONS[@],$(X_XNEST_CONFIG_OPTIONS),g' \
-               -e 's,[@]X_XNEST_UNSCALED_FONTPATH[@],$(X_XNEST_UNSCALED_FONTPATH),g' \
                -e 's,[@]GDM_RBAC_SYSCMD_KEYS[@],$(GDM_RBAC_SYSCMD_KEYS),g' \
                -e 's,[@]datadir[@],$(datadir),g' \
                -e 's,[@]gdmconfdir[@],$(gdmconfdir),g' \