* remote.c (record_curthread): Must not modify inferior_pid when

	* remote.c (record_curthread): Must not modify inferior_pid when
	called from wait_for_inferior.  Instead, if a new thread-id is
	detected, call add_thread.  (MAGIC_NULL_PID): new macro, use
	instead of the magic number "42000".  (remote_find_new_threads):
	if inferior_pid is unknown, get and use the current thread id.
	(remote_start_remote): on connecting, attempt to get the current
	thread id for inferior_pid.  (remote_resume): If pid == -1,
	then resume any-thread (not the current thread specifically).
	* thread.c (info_threads_command): don't initialize current_pid
	until after call to FIND_NEW_THREADS (which may change inferior_pid).