K 10 svn:author V 3 alc K 8 svn:date V 27 2002-03-27T21:47:50.000000Z K 7 svn:log V 264 Allow resursion on the pipe mutex because filt_piperead() and filt_pipewrite() can be called both with and without the pipe mutex held. (For example, if called by pipeselwakeup(), it is held. Whereas, if called by kqueue_scan(), it is not.) Reviewed by: alfred END