mod_firewall: Initialize compiled chunk just once for all handlers This should fix a case where some stateful dependencies (such as throttles) produce separate instances for every call to new_handler(), leading to surprising behaviour (e.g. rules executed via JUMP CHAIN vs ::deliver would have separate rate limits). This also adds better error handling in case the compiled code fails to run for some reason.

# 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.