Make the bufferevent_connect_fail test faster on OSX. It seems that connecting to a listener that is bound but not accepting or listening doesn't give a 'connection refused' error on OSX, but rather makes the connect() time out after 75 seconds. I couldn't find any way to make the timout shorter. Fortunately, closing the listener after a second or so makes the desired error occur after another second or so. svn:r1457