It existed but was hardcoded to True.
Give it an underscore for consistency.
Also don't pull in syweb unless we're actually using the web client.

Fix ban

Don't block waiting on waking up all the listeners when sending an event

actually uphold the bind_host parameter. in theory should make ipv6 binds work like bind_host: 'fe80::1%lo0'

Metrics

Option to serve metrics from their own localhost-only TCP port instead of muxed on the main listener

Bugfix to sql_txn_timer increment - add only the per-TXN duration, not the total time ever spent since boot

Replace the @metrics.counted annotations in federation with specifically-written counters and distributions

Rename the timer metrics exported by synapse.storage to append _time, so the meaning of ':total' is clearer

Export CacheMetric as hits+total, rather than hits+misses, as it's easier to derive hit ratio from that