Purge SXEmacs of tooltalk cruft -- src, lisp

Purge SXEmacs of tooltalk cruft -- src, lisp

This kills off pretty much all of the tooltalk.  But I expect a couple
more (at least) changesets to completely tidy it up.

	* lisp/Makefile.am (corelispels): Remove check-features.el.  It
	  was just tooltalk and sparcwork cruft.

	* lisp/dumped-lisp.el (packages-hardcoded-lisp): Remove tooltalk
	  related stuff.  Was all just comments anyway.

	* lisp/subr.el (error): Remove tooltalk-error

	* src/ui/Makefile.am (libsxeui_a_headers): Remove tooltalk.h

	* src/ui/X11/ExternalClientP.h: Remove the use_tooltalk member
	  from the ExternalClientPart struct.

	* src/ui/X11/ExternalClient.c: Remove tooltalk cruft.

	* src/ui/X11/ExternalClient.c (send_tooltalk_handshake): Remove.

	* src/ui/X11/ExternalClient.c (tt_callback): Ditto.

	* src/symsinit.h: Remove tooltalk cruft.

	* src/procimpl.h: Remove tooltalk from process_methods

	* src/process.c (connected_via_filedesc_p): return 0 regardless.
	  It was only ever non-0 with a tooltalk connection.  'nuff said.

	* src/process-unix.c (unix_tooltalk_connection_p): Remove.

	* src/process-unix.c (process_type_create_unix): Remove tooltalk cruft.

	* src/lrecord.h: Remove tooltalk cruft.

	* src/inline.c: Ditto.

	* src/gdbinit: Ditto.

	* src/emacs.c (shut_down_emacs): Ditto.

	* src/dbxrc (Usage): Ditto.

Signed-off-by: Steve Youngs <steve@sxemacs.org>