Plan 9 from Bell Labs’s /usr/web/sources/patch/applied/plumbmem/readme
fix crash due to timing bug in libplumb as here http://9fans.net/archive/2009/04/103 http://9fans.net/archive/2009/04/121 http://9fans.net/archive/2009/04/124 http://9fans.net/archive/2009/04/126 also fix a few trivial memory leaks in plumber.
