mod_firewall: Update user marks to store instantly via map store The original approach was to keep marks in memory only, and persist them at shutdown. That saves I/O, at the cost of potentially losing marks on an unclean shutdown. This change persists marks instantly, which may have some performance overhead but should be more "correct". It also splits the marking/unmarking into an event which may be watched or even fired by other modules.

# mod_tos

A very drafty module to implement some kind of Terms of Service acceptance
tool.

Currently, this only works with clients implementing this very drafty
protocol. The result of the experiments will be an update to the
[ToS ProtoXEP](https://xmpp.org/extensions/inbox/tos.html), with the goal
of acceptance.