You should be able to control this from the Server Admin application. If it's not obvious from the UI or the help, add a comment here and I'll walk you through the UI steps.

How do I reset the software Mac OS X Update Server
There does not seem to be a clear-cut way to determine when a paladin's actions have become egregious enough to justify them breaking their oath. Do a lot of minor slights eventually add up and cause an oath to be broken? Do they get some sort of warning like losing their laying on of hands ability? 
