Merge branch 'devel' of github.com:neutrinolabs/xrdp into devel

configure.ac

@@ -133,6 +133,9 @@ AC_CHECK_HEADER([X11/Xlib.h], [],
 AC_CHECK_HEADER([X11/extensions/Xfixes.h], [],
   [AC_MSG_ERROR([please install libx11-dev and libxfixes-dev or libXfixes-devel])],
   [#include <X11/Xlib.h>])
+AC_CHECK_HEADER([X11/extensions/Xrandr.h], [],
+  [AC_MSG_ERROR([please install libxrandr-dev or libXrandr-devel])],
+  [#include <X11/Xlib.h>])
 
 libdir="${libdir}/xrdp";
 if test "x${prefix}" = "xNONE" ; then