Original server.xml file magically appears.

I had to restore my own version of the server.xml file on my server this morning. It appeared to have the original one back. Just trying to figure out what happened. I don't have a clue where it would have even got it the old one from.
There was a thunderstorm last night and the powerer did go out. Could this have any part in what happened?
Any ideas greatly appriciated!