Change "gboolean connected" to "CamelServiceConnectionStatus status",

Change "gboolean connected" to "CamelServiceConnectionStatus status",

	* camel-service.c: Change "gboolean connected" to
	"CamelServiceConnectionStatus status", which can be disconnected,
	connecting, connected, or disconnecting.
	(camel_service_init, camel_service_finalize): create/destroy the
	connect_op_lock. Refer to service->status rather than
	service->connected.
	(camel_service_connect): When connecting, note the current
	operation (and create a new one if there's none registered) and
	mark the connection "connecting" until we succeed or fail.
	(camel_service_disconnect): Likewise in reverse.
	(camel_service_cancel_connect): New function to cancel a
	connection attempt.
	(cancel_connect): Default implementation: Call
	camel_operation_cancel on the connect_op.

	* camel-disco-store.c (disco_connect): Only call
	CamelRemoteStore's connect func if we're online.
	(disco_cancel_connect): Fall back to offline if a connection gets
	cancelled.
	(disco_get_folder_info): Kludge: call connect explicitly before
	deciding whether to do the online or offline version, so if the
	connect fails, we fall back correctly.

	* camel-session.c (camel_session_get_service_connected):
	s/svc->connected/svc->status/

	* camel-remote-store.c (camel_remote_store_finalise):
	Change service->connected check to service->status check.
	(remote_connect): Don't set service->connected here:
	camel_service_connect() itself does that.

	* camel-operation.c (camel_operation_registered): Deal with the
	possibility that there's no registered op.