Do not validate or parse url

[cfi]

Pull this only after pulling regex_service branch.

a) After we allow regex matching in "service =" options this is no
longer required to make usage of this option feasible
b) It was the wrong thing to do. Github and other services
authenticate via ssh. And ~/.ssh/config allows to specify arbitrary
names as "Host"s. So users can attach a certain ssh identity to a
certain repo on gitlab. remote.origin.url then usually does not
look like an url anymore and is meaningless tu urllib.parse.

Now, to passport for e.g. github, use:

  service = github(.com)?(:.*)?

This is a separate pull request to distinguish between adding the feature on the regex_service branch (which is somewhat backwards compatible) from this change. Not using urllib.parse may require users to change their configs. Since domain.com even as a regex still matched the origin domain.com in most cases this should behave fine. Anyway, explicit is better than implicit ;-)