now have a thread safe realpath(3) implementation - added check to only
   define -DHAVE_BROKEN_REALPATH where required
   (thanks to Martin Blapp from the FreeBSD team for the patch)


configure.in:
   - FreeBSD 4.8-STABLE (480101) and 5.0-CURRENT (500110) now have a thread
     safe realpath(3) implementation - added check to only define
     -DHAVE_BROKEN_REALPATH where required