[Pkg-privacy-maintainers] obfs4proxy update & backport

[Ulrike Uhlig]

Hi!

I'm currently at the Tor meeting in Stockholm and learnt that Tor would
like to take better care of the bridges running obfs4. In order to do
that they need obfs4proxy to be a bit more up-to-date in Debian
(otherwise bridge operators do horrible things like installing it from
Git and never seeing any updates, bah!).

It looks like Michael Stapelberg was the one taking care of this package
last (in 2018), while uploaders are still Lunar and Ximin. I was
wondering if

- Michael: you'd like to update that package to the current upstream
  version
- others from the privacy team want to go ahead and do that update as
  part of a team upload
- Lunar and Ximin (last uploads in 2016) would like to be deleted from
  the Uploader field.

Ana Custura proposed her help by maintaining a backport.

What do you all think about that?

Cheers!
Ulrike