Fix the lumberjack script

While setting up lumberjack on Debian Wheezy, I ran into some issues with the init-script:

 * The init-script could be run as non-root user
 * When running 'start' it was possible to start the daemon multiple times
 * 'status' reported 'stopped' when daemon was running (and PIDFILE had the right PID in it)
 * LSB header contained wrong information

I'll test the initscript tomorrow in a Squeeze machine. But I was hoping you'd have some other distros to test on.