inotify.server: the decorator eventaction() shouldn't be a method of repowatcher

inotify: add log config option redirect inotify server output to a file

cmdutil: service: logfile option to redirect stdout & stderr in a file

inotify: raise QueryFailed when the server crash When the server crashes, it does not write back on the socket. The message which is then read from the socket is '', which raises a TypeError. Catching TypeError to raise QueryFailed instead.