The trusted users list should accept regex

[knightjoel]

The primary use case is so that "*@domain.com" can be specified which would make it convenient to trust all users in an org or belonging to a specific domain. Intention is to allow any manner of regex to be specified, however.

[knightjoel]

I'm pulling up short on this a little bit. Instead of the added complexity and slight performance degradation of doing a regex check against every item in the trust list, I'm going to allow list items in the format of @domain.com. This still provides a convenient way of white listing an entire org's users.