[Freedombox-pkg-team] plinth is marked for autoremoval from testing

[Debian testing autoremoval watch]

plinth 0.49.1 is marked for autoremoval from testing on 2019-03-10

It (build-)depends on packages with these RC bugs:
917582: mod-gnutls: FTBFS: failure to build manual
917584: mod-gnutls: FTBFS: test failures on multiple arches