Removed bashism in test for the pkg-config version.

Removed bashism in test for the pkg-config version.

2001-04-19  Sebastian Wilhelmi  <wilhelmi@ira.uka.de>

	* configure.in: Removed bashism in test for the pkg-config
	version.

	* configure.in: Rewrote test for multithread flag. Now uses
	localtime_r, which hopefully has a consistent prototype across
	different platforms. Also it uses a clever double EGREP trick
	instead of compiling, which could give false positives. Thanks to
	Dan Winship <danw@ximian.com> for the hint.