Login plugin to skip TFA from trusted IP addresses

Make patch compatible for version 8.x-1.0

Triaging older open Merge Requests:

I'm inclined to believe this, as currently proposed, should be a 3rd party module and not included in the base code.

I tend to align that plugins should be kept outside of TFA to allow more flexibility and allow TFA to focus primarily on API.

Is there a strong use case that the overwhelming majority of sites would use this feature?

Side note: Also consider IPv6 when this is implemented.

As noted in #30 I suggest this be a contrib module if desired.

cmlara → closed merge request !9