Give "globals.h" an RCS ID and copyright/GPL notice.

Give "globals.h" an RCS ID and copyright/GPL notice.

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.

git-svn-id: http://anonsvn.wireshark.org/wireshark/trunk@649 f5534014-38df-0310-8fa8-9805f1628bb7