SRV Record Ping for Server Status Checker

[ColaIan]

Feature request as title, thanks :D

[dscalzi]

@ColaIan do you have a srv ip I could use to test? You can DM me on discord if you want.

[dscalzi]

Support added in dscalzi/helios-core@2c037d8, it will be available once #270 is merged.