Reintroduction of the MULTIHOME parameter

[Chaos02]

Reintroduction of the Multihome parameter for better compatibility with complex networks.

Seemingly allows better operation on IPv6 only networks

Caused by:
#301

[wolveix]

Hey @Chaos02, thanks for the contribution! I've adjusted your repo to fit the consistency of the rest of the repo (e.g. alphabetised order for environment variables in the README, logical ordering of variable handling in run.sh, etc.

Unfortunately, your IPv6 regex doesn't support shorthand values (e.g. 2041:0000:140F::875B:131B). Personally, I would omit IP validation, but I'll leave the ball in your court on that one! I haven't tested your changes in v4-only and v6-only environments yet, but I'm assuming you have? :)

[Chaos02]

Thanks a lot!
I've tried to sort by relation / purpose, didn't notice that it's alphabetical...
I implemented the valid-ness of IPs since it's kind of a hassle if you give the server invalid Syntax (it crashes ungracefully and you have to dig the log).
Totally forgot about the shorthand, will absolutely add.
Tested in V6 only, yes.
Currently don't have v4 only but I'll just try forcing v4

[Chaos02]

Fixed IPv6 validation - the regex lets through some edge cases but I added a double check using the PING command, since it not only validates but also checks if the interface exists.
At your choice wether to use just PING as the sole validator.

Will test after the holidays, no access to test environment