staging URL in defaultconf with live URL in desired files makes for a lot of accounts

[Mrten]

I haven't debugged this fully but if you put the staging URL in the defaultconf and a live URL in every desired file AND when you start with a clean acmetool state directory (as an upgrade cleared out my state dir) you'll walk into the max 10 accounts/3 hours rate limit.

Fix was easy: make defaultconf have the live URL.