Redeploy the testing grid staging node on a new, more stable host.

Also some refactoring to make this easier in the future, steps towards
unifying production and testing definitions, and start of docs for the whole thing.

Deploy PaymentServer with Let's Encrypt-issued certificates.

so it won't be running yet when this runs

right???

reordering/reformatting just to make commenting easier

maybe the other systemd timer fires right away too

why make it a plugin, then, you may ask.
or perhaps you may not ask.

Deploy v1 production grid

Also, a hostId as required by zfs.

And account for the odd-host-out. :/  See if you can spot it.

Fix Foolscap protocol issues.