Replaces the three previous soup_connection_new* functions and uses

Replaces the three previous soup_connection_new* functions and uses

	* libsoup/soup-connection.c (soup_connection_new): Replaces the
	three previous soup_connection_new* functions and uses gobject
	properties to set the destination and proxy uris.
	(class_init): set up two more signals, authenticate and
	reauthenticate.
	(soup_connection_send_request): virtualize
	(send_request): Default implementation

	* libsoup/soup-connection-ntlm.c: New SoupConnection subclass that
	also handles NTLM authentication. Includes all of the NTLM code
	formerly in soup-auth-ntlm.c.

	* libsoup/soup-auth-ntlm.[ch]: Gone.

	* libsoup/soup-auth.c: Remove NTLM refs

	* libsoup/soup-session.c (class_init): Add gobject properties for
	proxy, max_conns, use_ntlm. Change the "authenticate" and
	"reauthenticate" signal prototypes to not pass a SoupAuth (so they
	can be used for authenticating SoupConnectionNTLM as well, which
	doesn't use a SoupAuth).
	(soup_session_new): Renamed from soup_session_new_default.
	(soup_session_new_with_options): Replaces
	soup_session_new_with_proxy and soup_session_new_full. Takes
	gobject properties.
	(run_queue): Create a new connection of type SoupConnection or
	SoupConnectionNTLM depending on our "use_ntlm" property. Connect
	to its authenticate and reauthenticate signals.
	(connection_authenticate, connection_reauthenticate): proxy these
	signals.

	* libsoup/soup-address.c (update_address_from_entry): Fix a
	crasher when failing to resolve the address.

	* libsoup/soup-dns.c (check_hostent): Fix some "how was this
	working before" bugs.

	* libsoup/soup-message-client-io.c (soup_message_send_request):
	call soup_message_prepare() to clean up the existing response
	state.

	* libsoup/soup-message-io.c (io_error): Set the read_state to DONE
	when processing an OK EOF.

	* libsoup/soup-status.h (SoupStatusClass): fix the numbering of
	these so that SOUP_STATUS_CLASS_SUCCESS is 2, etc.

	* tests/auth-test.c (authenticate, reauthenticate): Update for new
	prototypes.
	(main): Use soup_session_new.
	* tests/get.c (main): Likewise.
	* tests/simple-proxy.c (main): Likewise.