Support wildcard for Basic auth domains

[doublemarket]

By merging this PR, the domain name for a basic auth setting allows wildcards (*). e.g. *.example.com matches foobar.example.com, * matches any hostname.

Note that I confirmed that this passes tests on the latest master branch but the jar file based on it doesn't work due to the #263. I confirmed the jar file generated based on 2.0.1 + changes in this PR works.

[ericbeland]

We have some big changes coming in about a month. We're trying an approach to drop littleproxy. I feel bad about it, but I think the basic auth part just got hit with a minor rewrite. I'd like to review when that change lands.

[doublemarket]

@ericbeland Wow, that's a big news! I'm looking forward to see the changes. Please review if this PR still has some values with the new version. Otherwise... heh, no worries 😄