Change the SoupURI properties to SoupAddress properties.

Change the SoupURI properties to SoupAddress properties.

	* libsoup/soup-connection.c: Change the SoupURI properties to
	SoupAddress properties.

	* libsoup/soup-address.c (soup_address_resolve_async)
	(soup_address_resolve_sync): Redo slightly so that multiple
	simultaneous attempts to resolve the same address won't cause
	problems.
	(soup_address_hash_by_name, soup_address_equal_by_name):
	(soup_address_hash_by_ip, soup_address_equal_by_ip): methods to
	hash addresses by name or IP address

	* libsoup/soup-message.c (soup_message_get_address): gets a
	SoupAddress corresponding to the message's URI

	* libsoup/soup-auth-manager.c (SoupAuthHost): hash hosts by
	soup_address_hash_by_name() rather than by URI.

	* libsoup/soup-session.c (soup_session_get_connection): pass
	addresses to soup_connection_new(), not URIs.
	(SoupSessionHost): hash hosts by soup_address_hash_by_ip() rather
	than by URI. This requires that the addresses will have already
	been resolved by the SoupSession subclasses before calling
	soup_session_get_connection(), but also means that now requests
	made to different virtual hosts on the same IP address can share a
	connection.

	* libsoup/soup-message-queue.c (SoupMessageQueueItem): add
	address-resolving state

	* libsoup/soup-session-sync.c (process_queue_item): resolve the
	message's address before getting a connection

	* libsoup/soup-session-async.c (run_queue, resolve_msg_addr)
	(resolved_msg_addr): resolve the message's address before getting
	a connection
	(request_restarted): if the message gets requeued to a different
	host, we'll need to re-resolve the address.

	* libsoup/soup-uri.c (soup_uri_copy_root, soup_uri_host_hash)
	(soup_uri_host_equal): No longer needed

	* libsoup/soup-dns.c (do_async_callback): disconnect from the
	cancellable before invoking the callback

	* tests/proxy-test.c (tests): fix the 403 example; hostnames are
	resolved by the session now, even when sending to a proxy, so we
	need to use a hostname that actually exists

svn path=/trunk/; revision=1179