Split mumble and murmur packages

[TalviT]

Currently the murmur package links to mumble.
Since I want to run murmur on a headless server, I would prefer not to have to install the qt5 packages.
Unfortunately I have no experience to build packages myself, but I found that the mumble documentation provides a list of build flags in which client build can be disabled:
https://github.com/mumble-voip/mumble/blob/master/docs/dev/build-instructions/cmake_options.md#client

[paper42]

The problem is not that it's linked to mumble, that just means it's a subpackage. The issue is that murmur depends on mumble since this package was added. According to other distributions, this shouldn't be necessary.

Could you test if removing the depends= line and increasing revision helps and murmur still works? If it does, please submit a PR with these changes.

[oynqr]

Murmur depends on qt5, there's no way around that. If you want a headless alternative, try uMurmur.

[paper42]

Murmur depends on qt5, there's no way around that. If you want a headless alternative, try uMurmur.

That might be true, but also we can avoid 200MB (leaving only 67MB) of dependencies if we don't make it depend on mumble, because mumble pulls in GTK3 and all its dependencies.

[paper42]

murmur now doesn't depend on mumble