options `start' and `stop' now (unless I have forgotten any). This allows
us to call the scripts from /etc/rc.shutdown with the correct option.
The (42 or so) ports that already DTRT before are unchanged.
Explanation: this port used to use the Linux quake client in server mode. It now uses the BSD/OS dedicated server binary, which has lower CPU and memory footprint, and has a different version numbering scheme.