Mark DEPRECATED and set an EXPIRATION_DATE

From the PR:
coverhunter needs Amazon Developer's Token to actually work, but the page
that is noted in pkg-message no more exists, and i wasn't able to register
any free developer accounts on amazon - all of them need to apply credit
card payment (and very probably APIs had changed so far). So this
application have not use for us, and i believe should be removed from the
ports tree. The latest release was in 2004, so it looks like abandonware.

PR: 158648
Submitted by: Ruslan Mahmatkhanov <cvs-src@yandex.ru>