Fix tests and logic.

Fix tests and logic.

Indeed, from on:
  1. We strip out IPs.
  2. We strip out "potential" INVALID that:
     - doesn't contains dots
     - contains at least 2 consecutive dots
     - looks like an IP.

From now on an acceptable subject shall:
  1. have at least 1 dot.
  2. NOT be an IPv4 or IPv6
  3. NOT look like an IP. (Example: 258.300.10.3)