Comment 15 for bug 1721272

So as mentioned before this has a bit of back and forth, ignoring that the effective changes are:
- not renaming, but aliasing to "ua"
- fixup and enable tests on build (was requested on a former review)
- I checked, the symlinks are good after install
- I checked the tests are running fine on build
- I verified that the debdiff changes 100% match the git changes they are based on
- I don't mind that the changelog has v11/v12 being mostly a revert, that is the "true" changelog, so I agree to keeping it.

From our IRC discussion I know that you already know that some of this hardly backports for different constraints, so I don't need to mention that - for Bionic and that is important now that LGTM. I'd only have been concerned on the "ua" namespace, but since Steve acked that in c#3 I'm good.

Sponsored into Bionic as of now, since the last released version was 10 I built with -v10.

@Andreas - please track migration (which might take a while for the dep8 tests to run atm), to trigger the SRUs at the right time.