This update for mumble fixes the following issues:

mumble was updated to 1.3.4:

* Fix use of outdated (non-existent) notification icon names
* Fix Security vulnerability caused by allowing non http/https
URL schemes in public server list (boo#1182123)
* Server: Fix Exit status for actions like --version or --supw
* Fix packet loss & audio artifacts caused by OCB2 XEX*
mitigation

- update apparmor profiles to get warning free again on 15.2
- use abstractions for ssl files
- allow inet dgram sockets as mumble can also work via udp
- allow netlink socket (probably for dbus)
- properly allow lsb_release again
- add support for optional local include
- start murmurd directly as user mumble-server it gets rid of the
dac_override/setgid/setuid/chown permissions

Update to upstream version 1.3.3

Client:

* Fixed: Chatbox invisble (zero height) (#4388)
* Fixed: Handling of invalid packet sizes (#4394)
* Fixed: Race-condition leading to loss of shortcuts (#4430)
* Fixed: Link in About dialog is now clickable again (#4454)
* Fixed: Sizing issues in ACL-Editor (#4455)
* Improved: PulseAudio now always samples at 48 kHz (#4449)

Server:

* Fixed: Crash due to problems when using PostgreSQL (#4370)
* Fixed: Handling of invalid package sizes (#4392)