Ability to Apply Custom MTU and Other Wireguard Settings to Client

**Is your feature request related to a problem? Please describe.**
I am having issues reliably accessing websites over the Defguard Wireguard VPN when using Starlink. Issue looks related to having a too large MTU value. Sites are reachable but either don't load or struggle to do so.

**Describe the solution you'd like**
Either the ability to update MTU and other settings through the Defguard client GUI, or though a config file.

**Describe alternatives you've considered**
Setting a lower MTU on the WAN port of the firewall on the server side, or changing MTU on client side router.