Fix status command, when pid file is present

The current status command does not work, when socat terminates
and leaves the pid file present.
In addition the status command is not LSB compliant. see:
http://clusterlabs.org/doc/en-US/Pacemaker/1.0/html/Pacemaker_Explained/ap-lsb.html

The suggested patch fixes that, using the standard Debian status_of_proc Command.