Vim control lines were re-introduced or not entirely cleaned up.
This nukes them again.
Removing from modules, netwerk, security, storage, testing, toolkit, and
a few scattered misc files. More to come.
Since there really is no need to add file detection logic to the updater
if updating through AUS is old->new only anyway, replacing bzip2
handling with xz handling is fine, instead of adding it.
Considering the far superior compression of LZMA and MAR not being
a common archive format anyway, let's just K.I.S.S. it :)