Add Xtrans definitions (FONT_t, TRANS_CLIENT) to clean up warnings.

Add XSERV_t, TRANS_SERVER, TRANS_REOPEN to quash warnings.
Add #include <dix-config.h> or <xorg-config.h>, as appropriate, to all
    source files in the xserver/xorg tree, predicated on defines of
    HAVE_{DIX,XORG}_CONFIG_H. Change all Xfont includes to
    <X11/fonts/foo.h>.

os/xdmcp.c

@@ -16,6 +16,10 @@
  */
 /* $XFree86: xc/programs/Xserver/os/xdmcp.c,v 3.31 2003/12/30 21:24:32 herrb Exp $ */
 
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
 #ifdef WIN32
 #include <X11/Xwinsock.h>
 #endif