DNS: Add OpenPGP KEY (61) RRtype (draft-ietf-dane-openpgpkey-00)

Not yet tested on real dns traffic

Update also last updated DNS parameters (2014-08-12)

Change-Id: I6109d585584e5fca11c606a2230d8ef89cdbf7b6
Reviewed-on: https://code.wireshark.org/review/3870
Reviewed-by: Evan Huus <eapache@gmail.com>