Apple's servers have a gateway timeout a small but noticeable percentage
of the time, which was breaking the script. Detect such Apple flakiness
and keep trying.
Adds support for building Lokinet as a system extension, and fixes
various problems in the macos implementation found during development of
the system extension support.
Codesigns and notarizes the package. Requires a bunch of stuff to
actually get this working. (see contrib/macos-signing.txt).
I'm currently also building with
-DLOKINET_GUI_REPO=https://github.com/jagerman/loki-network-control-panel.git -DLOKINET_GUI_CHECKOUT=cmake
because it needs the camke-ification PR for the control panel to
properly sign everything there.
