Pkg update -- net-utils (dns, dig)

Pkg update -- net-utils (dns, dig)

This updates 2 libs in net-utils from the Gnus package so that they can be
removed from the latter.

	* xemacs-packages/net-utils/dns.el: Update from the version in
	Gnus upstream.  Lots of doc updates.  Remove cl and mm-util
	requirement.
	(dns-servers-valid-for-interfaces): New.
	(dns-read-string-name): Don't use #'mm-with-unibyte-buffer.
	(dns-write): Ditto.
	(dns-read): Ditto.
	(dns-read-type): Ditto.
	(dns-servers-up-to-date-p): New.
	(dns-set-servers): New.
	(dns-query-cached): Renamed from 'query-dns-cached'.
	(dns-query): Renamed from 'query-dns'.

	* xemacs-packages/net-utils/dig.el: Updated from the version in
	Gnus upstream.  Predominately doc updates and not much else.
	(dig-mode): Defined with #'define-derived-mode instead of #'defun.

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