Bug#982904: mumble: CVE-2021-27229

[Chris Knadle]

Note: for the three messages recently sent (Benedikt, Salvatorie, Chris/me) that 
have recently been sent, none went to #982904 because the bug had been archived. 
I've unarchived the bug since fixing it for Buster is still pending.

  -- Chris
--
Chris Knadle
chris.kna...@coredump.us