Log Message:
mumble: Update to 1.3.4

Client

Fixed: Don't use outdated (non-existent) notification icon names on Linux (#4705)
Fixed: Security vulnerability caused by allowing non http/https URL schemes in \ 
public server list (#4733)

Server

Fixed: Exit status for actions like --version or --supw was always set to \ 
non-zero ( #3998)

General

Fixed: Packet loss & audio artifacts caused by OCB2 XEX* mitigation (#4720)