K 10
svn:author
V 3
kib
K 8
svn:date
V 27
2009-03-24T20:57:10.131838Z
K 7
svn:log
V 605
Mostly synchronize  lib/libthr and sys/kern/kern_umtx.c with the code
from HEAD.

Since libkse is still built on RELENG_7, pthread_cleanup_push/pop
are left as the functions, but the support code in libthr is present for
the macro versions.

Malloc in RELENG_7 does not require thread exit hook, but I decided
to add empty handler for it, instead of removing callback from thr_exit().

No mergeinfo since this change is prepared by patching libthr and then
bringing in required missed bits.

Requested by:	bms
Reviewed by:	davidxu
Tested by:	bms, Mykola Dzham <i levsha org ua>
Approved by:	re (kensmith)

END