Synchronize with potato-branch again:

Synchronize with potato-branch again:
+ scripts/dpkg-divert.pl: fixed typo
+ debian/dpkg-dev.{postinst,prerm}: remove emacsen-common stuff
+ po/{es,sv}.po: updated
+ debian/changelog: include changes for 1.6.12
+ dpkg-genchanges: recognize non-deb packages (tarballs, such as
  dpkg-non-deb and boot-floppies disk tarballs). This makes sure that we
  include them when figuring up the Arch field in the .changes
+ scripts/dpkg-buildpackage.sh: Don't default to no signing until
  after we parsed the options, otherwise we will miss overrides.