Drop maintainership

[Toni Gundogdu]

I can no longer maintain the following ports:

  * multimedia/abby
  * multimedia/cclive
  * multimedia/clive
  * multimedia/clive-utils
  * multimedia/quvi
  * multimedia/umph

Perhaps someone reading this list could take them over.

clive-utils could be removed from the collection, altogether.
The project's been inactive for well over a year now and there
have not been any plans to revive it.

In any case, please remove my email from the above ports.
Thanks.