Add option to `zap` for clearing out packages that mismatch versions in aports
I bounce around between branches fairly often, and packages are frequently updated between branches, I get a lot of these types of warnings: WARNING: Package 'sdl2' in your aports folder has version 2.0.5-r0, but the binary package repositories already have version 2.0.5-r9999!.
It would make sense to have some form of zap that also clears out any binary packages that are newer than anything in aports, since clearing out ALL packages (-p) is overkill.