Move some defines that would be used even by a non-GTK+-based Ethereal
from "gtk/main.h" to "globals.h".
Remove the byte-order #defines from "packet.h", as they're now in
"globals.h" (having been moved there from "gtk/main.h").
Fix up some files that use those #defines to include "globals.h".
"resolv.c" doesn't use any GTK stuff, so it needn't include <gtk/gtk.h>
nor "gtk/main.h" - it only did so to get the byte-order #defines for the
benefit of "packet-ipv6.h", and "packet-ipv6.h" now includes them
itself.
svn path=/trunk/; revision=649
Guy Harris