fix: Instructions for OpenBSD

Add instruction to change login class of user "_tor" to the one that is being created at "/etc/login.conf".

@gman999 can you review this MR? Thanks!

assigned to @gus

requested review from @gman999

It is difficult to review this merge request because I think the repository was deleted? or maybe is private.

I am not sure. I wanted to rebase, to make a build and review, but it is not possible.

@northboot, could you make this repository public, so we can build your changes and review more comfortably? thanks!

I changed the visibility to public now, not sure why it was set to private. Can you try again?