Take a uri string instead of a context. Also, swap the args (so the method

Take a uri string instead of a context. Also, swap the args (so the method

	* libsoup/soup-message.c (soup_message_new): Take a uri string
	instead of a context. Also, swap the args (so the method comes
	before the URI, just like in the protocol).
	(soup_message_new_from_uri): Like soup_messgae_new, but takes a
	SoupUri instead of a string
	(soup_message_set_request, soup_message_set_response): Replace
	soup_message_new_full.
	(cleanup_message): Was soup_message_cleanup, but is static now.
	(queue_message): Do the pre-queuing message cleanup here instead
	of in soup_queue_message.
	(soup_message_queue): Set the callback and user_data, then call
	queue_message.
	(requeue_read_error, requeue_read_finished, soup_message_requeue):
	Use queue_message
	(soup_message_get_uri): Replaces soup_message_get_context.

	* libsoup/soup-message.h (SoupMessage): Remove msg->context. (It's
	part of SoupMessagePrivate now)

	* libsoup/soup-context.c: #include soup-message-private
	(soup_context_from_uri): constify the uri arg.

	* libsoup/soup-queue.c: Various context/uri fixes
	(proxy_https_connect): Use soup_message_new_from_uri.
	(soup_queue_message): Drastically simplified since most of the
	work is in soup-messsage.c:queue_message() now

	* libsoup/soup-auth-digest.c (compute_response,
	get_authorization): Use soup_message_get_uri.

	* libsoup/soup-server-auth.c (parse_digest): Likewise

	* libsoup/soup-server.c (call_handler): Likewise

	* tests/simple-httpd.c (server_callback): Likewise.

	* tests/simple-proxy.c (server_callback): Likewise

	* tests/get.c (got_url): Likewise.
	(get_url): Update soup_message_new usage.

	* tests/auth-test.c: #include soup-message-private. Update for
	context changes and soup_message_new change.