Improving the currency of anaconda's pot file

[Jeremy Katz]

Since we're really bad at manually updating anaconda's pot file, I'd
like to move to it happening more regularly.  But to do so in a way
that's reasonable time-wise, we'll need to stop doing the automatic
msgmerge of po files for anaconda.  Given that many of the modules on
i18n.redhat.com aren't automatically msgmerge'd, I don't think this
should be a big problem, but wanted to check for feedback before just
making the change.

So thoughts?

Jeremy