- move the meat of handle_options from dpb into config->parse_command_line
(this means a backcall to still inherit from OpenBSD::State).
- move parse_config_files from core into config.
- move the prop handling into proper HostProperties (part of config
obviously)
- create a Core::Init file that contains all the former DPB::Host::Factory
and associated jobs.
there's still a wee little bit of cleanup to do, but this should be
easier to maintain, as all option handling is now in one place, and
startup and host confi is now easier to figure out.
- add a -DMIRROR=0/1 setup that controls whether SUPDISTFILES will be
fetched (defaults to 1 for -F and 0 for -f).
- actually allow for several host files to be parsed, as the name implies