There's something going on with the image cache on Cirrus where the images
are sometimes vanishing from the cache, thus causing builds to fail
because it can't load them. This forces a rebuild of all of the images,
thus refreshing the cached version of all of them.
With the release of alpine 3.17 (2022-11-22), the fts-dev package
was renamed to musl-fts-dev. Change it accordingly.
This is currently breaking CI in a fork of zeek/zeek. Suspect some
caching prevents it from breaking here currently.
Alpine 3.16 is still supported till 2024-05-23, but we're essentially
not doing CI testing for it anymore. Appears to be in line with the
comment in .cirrus.yml
This exposes Broker's new WebSocket support in Zeek. To enable it,
call `Broker::listen_websocket()`. Zeek will then start listening on
port 9997 for incoming WebSocket connections.
See the Broker documentation for a description of the message format
expected over these WebSocket connections.
