Option for using Atheme OperServ AKILL instead of direct klines

[Mikaela]

We are used to using OperServ AKILLs instead of klining directly and would like Sigyn to be able to do that too so we would see everything in AKILL LIST.

https://github.com/atheme/atheme/blob/a8f85e86722ac69c9a5260785f1a790afe347a91/help/default/oservice/akill