Split out the host keygen into their own command, to ease future migration
to systemd. Compatitbility with the init script was kept.
Migrate the package to full native systemd unit files, according to the Fedora
packaging guidelines.
Prepate the unit files for running an ondemand server. (do not add it actually)
- prevent initscript from killing itself on halt with upstart (#438449)
- initscript status should show that the daemon is running only when the
main daemon is still alive (#430882)
