Update autoinvite.py

[ScruffyRules]

Check description for what I did and look at the code of course. :)

[Poorchop]

The Arnavion-scripts folder exists just for archival purposes since Arnavion deleted his original repository that contained these scripts. I don't maintain any of these scripts and they are under a different license altogether, but you're free to publish your changes locally so that other people can benefit.

I'm open to pull requests on all other scripts outside this folder, and I'll make a note of that now. Thanks all the same for your proposed changes.