Look for both pthread_create and pthread_join in the thread library. Some

Look for both pthread_create and pthread_join in the thread library. Some

2000-04-26  Sebastian Wilhelmi  <wilhelmi@ira.uka.de>

	* configure.in: Look for both pthread_create and pthread_join in
	the thread library. Some systems define one of them, but not both
	in libc. Arghh. Now we really start a thread and join it later and
	check, whether the thread to actually ran.