K 10 svn:author V 8 cperciva K 8 svn:date V 27 2010-06-13T01:13:36.461468Z K 7 svn:log V 366 In threaded processes, destroy the mutex atexit_mutex when we've finished using it. This allows the mutex's allocated memory to be freed. This is one sense a rather silly change, since at this point we're less than a microsecond away from calling _exit; but fixing this memory leak is likely to make life easier for anyone trying to track down other memory leaks. END