Domain check is ignored with blacklist set

[bobrik]

Take a look at example:

> w = false
> b = true
> d = true
> if not w and not b and d then print("domain is checked!") end

This mimics:

  -- If no whitelist or blacklist, match on domain
  if not whitelist and not blacklist and domain then

The check should look like this: (domain or whitelist) and (not blacklist), here variables represent computed conditions for specific email.

This way you could have:

1. Full domain and some extra people from other domains.
2. Full domain except some people without access.

[bobrik]

Whitelist checks are also ignored after user signed in.