Lintian 2.2.12

This is the release that knows about Policy 3.8.2. It ended up being a bit more extensive than I had expected, since I started poking at the bug list last night and added fixes for three or four other things. I also read over the X fonts portion of Policy and added checks for several things that weren't previously checked.

Nothing here should be particularly exciting and hopefully won't cause any problems.

A complete archive-wide run of Lintian is now in progress. Hopefully the change to use libapt-pkg-perl will make it run faster and take less memory.