Limit the number of restarts via systemd

We allow 5 restarts within a 100 second interval to avoid persisting in
a hopeless situation.
Belongs to #15.

init.d/runSCdaq.service

@@ -9,7 +9,9 @@ User=scouter
 Group=scouter
 WorkingDirectory=/opt/scdaq/scripts
 Restart=always
-RestartSec=10
+RestartSec=5
+StartLimitInterval=100
+StartLimitBurst=5
 
 [Install]
 WantedBy=multi-user.target