require glib 2.12. check for timegm().

require glib 2.12. check for timegm().

	* configure.in: require glib 2.12. check for timegm().

	* libsoup/soup-date.c (soup_mktime_utc): Use timegm if available.
	(soup_date_iso8601_parse): use g_time_val_from_iso8601. #337010,
	patch from Emmanuele Bassi.

	* libsoup/soup-types.h: remove local copy of
	G_GNUC_NULL_TERMINATED since we now depend on a new-enough copy of
	glib.

	* libsoup/soup-misc.c (soup_base64_encode_close)
	(soup_base64_encode_step, soup_base64_encode)
	(soup_base64_decode_step): Make these just be wrappers around the
	glib base64 methods. (For now; eventually they'll just go away.)

	* libsoup/soup-auth-basic.c (authenticate):
	* libsoup/soup-auth-digest.c (authenticate):
	* libsoup/soup-connection-ntlm.c (soup_ntlm_parse_challenge)
	(soup_ntlm_response):
	* libsoup/soup-server-auth.c (soup_server_auth_new):
	* libsoup/soup-soap-message.c (soup_soap_message_write_base64):
	* libsoup/soup-xmlrpc-message.c
	(soup_xmlrpc_message_write_base64):
	* libsoup/soup-xmlrpc-response.c (soup_xmlrpc_value_get_base64):
	Use glib base64 methods

svn path=/trunk/; revision=921