Hello, this patch adds a murmur service.
Murmur is the biggest implementation of a mumble voice chat server. The
murmur executable is already packaged in the mumble package.

I added most of the available options to the configuration.
I consciously did not include the following settings:
-settings for changing the .ini at runtime through "ZeroC Ice" or "dbus"
-settings for different databases, because the wiki mentions problems
with other databases and strongly recommends using the default sqlite¹.

1) https://wiki.mumble.info/wiki/Murmur.ini (ctrl-f sqlite)