[Python-modules-team] Bug#808649: python-async: add warning by author to package description

[W. Martin Borgert]

Package: python-async
Version: 0.6.2-2

Upstreams homepage https://github.com/gitpython-developers/async
says in bold letters:

"Async is considered useless (by me, the author) as the GIL will
prevent anything good from happening (it gets slower instead of
faster in multi-threaded mode ;)). Please do not use this project,
which can be considered nothing more than an exercise I did years
ago."

If (or: as long as) the package makes sense in Debian, this warning
should be added to the package description.