Revision history for Perl extension threads.
+1.61 Wed Mar 21 16:09:15 EDT 2007
+ - Fix 'list/array' context - both keywords are supported
+ - Upgraded ppport.h to Devel::PPPort 3.11
+ - Removed embed.t - unreliable
+
+1.59 - Mon Feb 5 16:05:44 EST 2007
+ - POD tweaks per Wolfgang Laun
+
+1.58 Wed Jan 24 13:15:34 EST 2007
+ - Fix race conditions on thread destruction (Dave Mitchell)
+ - Ignore thread return value(s) in void context
+ - Check for missing args for 'use threads' options
+ - Check that stack size argument is numeric
+
+1.57 Wed Dec 20 13:10:26 EST 2006
+ - Fixes courtesy of Michael J. Pomraning
+ Eliminates self joins.
+ Eliminates multiple, simultaneous joins on a thread.
+ Protects thread->state variable with mutexes.
+ Checks that OS join call is successful.
+
1.56 Fri Dec 15 12:18:47 EST 2006
- More fixes to test suite