scheme for the same thread locking).


include/my_pthread.h:
  Added variable for lock diffirentiation.
include/wqueue.h:
  New release call.
mysys/wqueue.c:
  New release call in case of read/write lock.
storage/maria/ma_pagecache.c:
  Locking for read and write made waitimg for each other.
storage/maria/unittest/Makefile.am:
  New test added.
storage/maria/unittest/ma_pagecache_consist.c:
  Fixed thread initialization in the test.
storage/maria/unittest/ma_pagecache_rwconsist.c:
  New BitKeeper file ``storage/maria/unittest/ma_pagecache_rwconsist.c''