- Split up mac.sh into a configure + build scripts (like Windows).
- Don't attempt to build the 'package' target in CI: apparently you have
to have a logged in user at the GUI in order to build a .dmg because
being obtuse is the Apple way.
- Upload the raw Lokinet unsigned app in a .tar.xz, rather than dmg,
because of the above.
- make mac.sh respect JOBS (pun not intended (but still good))
