+20080301
+ + fixes from 20080223 resolved issue with mutexes; change to use
+ recursive mutexes to fix memory leak in delwin() as called from
+ _nc_free_and_exit().
+
+20080223
+ + fix a size-difference in _nc_globals which caused hanging of mutex
+ lock/unlock when termlib was built separately.
+
+20080216
+ + avoid using nanosleep() in threaded configuration since that often
+ is implemented to suspend the entire process.
+