* remote.c (remote_open_1): Move acknowledging any pending ack,

	* remote.c (remote_open_1): Move acknowledging any pending ack,
	querying supported features, activating noack mode, finding the
	target description, enabling extended remote, and checking remote
	symbols from here ...
	(remote_start_remote): ... to here.
	(remote_open_1): Don't pop the target if it is already gone.
	* target.c (unpush_target): Check for the dummy target.