Create a ListenerConfig object (#7681)

This ended up being a bit more invasive than I'd hoped for (not helped by
generic_worker duplicating some of the code from homeserver), but hopefully
it's an improvement.

The idea is that, rather than storing unstructured `dict`s in the config for
the listener configurations, we instead parse it into a structured
`ListenerConfig` object.

1 files changed, 1 insertions, 0 deletions

diff --git a/changelog.d/7681.misc b/changelog.d/7681.misc
new file mode 100644
index 0000000000..e474fc39cd
--- /dev/null
+++ b/changelog.d/7681.misc
@@ -0,0 +1 @@
+Refactor handling of `listeners` configuration settings.