control-archive 1.9.0

This is the software used to manage the archive of control messages and the Netnews active and newsgroups files at ftp.isc.org.

This release switches to gpg1 in order to support older keys and produces better diagnostics when the X-PGP-Sig header is invalid because it's missing the useless version field. It also includes various hierarchy metadata updates, including adding rocksolid.*, removing dictator.* at its maintainer's request, and updating the fr.* key.