Update CAPTCHA_SETUP (it continues to ignore fallback, but I guess I should fix it so that doesn't need the key in two different places)

Add original, unmodified CAPTCHA-SETUP from the webclient repo before modifying (captcha setup is now purely on the HS).

Don't test exact equality of the list: as long as it has the fields we expect, that's just fine. I added the user_id (as in database pkey) and it broke: no point testing what that comes out as: it's determined by the db.

2) Change places where we mean unauthenticated to 401, not 403, in C/S v2: hack so it stays as 403 in v1 because web client relies on it.

Remember the 'last seen' time for a given user/IP/device combination and only bother INSERTing another if it's stale

Store rearrangement

Add the tiniest of tiny one-element caches to get_room_events_max_id() as it's read every time someone hits eventstream

Allow @cached-wrapped functions to have more or fewer than 1 argument; assert on the total count of them though

Hotfixes v0.8.1 r2

Disable registration by default. Add script to register new users.