Fix module name in top comment

A bit of rubbish to update while I notice it.
Fixup misleading comment

This comment was misleading - this is the IP of whatever interface that is being processed, not just WAN IP. Might as well fix while noticed, to save someone else from misunderstanding in future.
The curwanip var is really "Current Interface IP" and could be called curinterfaceip, but I was not about to search/replace all that at this point, since it is only a var name.
Merge pull request #1351 from phil-davis/patch-7
Merge pull request #1352 from phil-davis/patch-8