Use of 0.0.0.0 address in server config causes logs to fill with WARN [HttpConfiguration] after enabling TLS

[Drew Freiberger]

The following message is shown every second in /var/snap/graylog/common/log/server.log when running on 3/stable (haven't tested on 4/stable yet).

2022-01-10T23:10:15.878Z WARN [HttpConfiguration] "https://0.0.0.0:9000/" is not a valid setting for "http_publish_uri". Using default <https://10.0.8.64:9000/>.

The charm should determine the proper network interface IP address to listen to for newer versions of Graylog to avoid the log spam.

It appears this could be specifically related to TLS HTTPS listeners and may not apply to non-tls endpoints, as the log does not complain about the http_publish_uri when it is set to http://0.0.0.0:9000/ before easyrsa is related to the charm.