Bug#956602: jami-daemon: any possibility to drop the dependency on librestbed?

[Francesco Poli (wintermute)]

Package: jami-daemon
Version: 20190215.1.f152c98~ds1-1
Severity: wishlist

Dear Alexandre,
first of all, thanks a lot for developing Jami and for maintaining
it in Debian!

I noticed that jami-daemon depends on librestbed0, which is facing
some OpenSSL linking licensing issues, as described in bug [#951877].

[#951877]: <https://bugs.debian.org/951877>

Beside the OpenSSL issues, librestbed0 is [dual licensed] under
a non-free "Corvusoft Permissive License" version 2.0 license
or the GNU AfferoGPL version 3 (or later).

[dual licensed]: <https://tracker.debian.org/media/packages/r/restbed/copyright-4.0dfsg1-5>

Jami is clearly choosing the GNU AfferoGPL here, since Jami
is released under the terms of the GNU GPL v3 (or later), which
is compatible with the GNU AfferoGPL v3.

However, the GNU AfferoGPL v3 is a controversial license, which has
raised a number of discussions, since its drafting and publication.
Some people (including me...) think that the GNU AfferoGPL v3 does
not meet the DFSG.

Do you think there is any chance to persuade the upstream developers
of librestbed to re-license it under more uncontroversially DFSG-free
terms (GNU GPL or more permissive)?
Or, failing that, is there any chance to drop the dependency on
librestbed, maybe replacing it with a dependency on some other
(GPL or more permissively licensed) library?

Please let me know, thanks for your time.