Fix integration of wildcard host lists by treating "*." as all subdomains (including no subdomain) of a host

Ref: https://github.com/badmojr/1Hosts/pull/139

Only create cronet engine for https tests, properly close connections in tests, pass in reusable cronet engine for https tests

Now only flavors describe the release channel instead of being mixed

Re-word README (#2)

Fix incorrect VPN section

A few more corrections.

Redo the sentences a bit in the readme.md.

Move third party notices from readme.md
to notice.md.

Fix LICENSE content

Implements #282

Latest GPLv3 text.