[pthreads] Define PTHREAD_STACK_MIN
|Reported by:||andreasf||Owned by:||axeld|
I encountered the following code snippet in Mono:
ret = pthread_attr_setstacksize(&attr, PTHREAD_STACK_MIN);
FreeBSD and NetBSD were special-cased to use 65536 instead.
No idea how standard this is, but maybe we should define it to something sensible?