- PTHREAD_MUTEX_RECURSIVE is POSIX, _NP doesn't exist
- try to link when looking for pthread_mutex_timedlock
- don't hard-code -lpthread
Bump revision, since the generated library changed.
list of changes is not available, but the old distfile isn't available
anymore
partially based on PR pkg/7969 and PR pkg/17980 by Wojciech Puchar
pkg was also converted to not depend on unproven-pthreads; this
is good enough to have the sample thread program running correctly
with pth, other pwlib apps need to be tested if they work with
non-preemptive threads
