- docs: add link to yaml.org
BREAKING: The `ini` configuration file format changed to `yml`. Please
rewrite your configuration file using the yaml format.
Fixes#1574
BREAKING CHANGE: The `general` section in the config schema has changed: the `general.base_*`, `general.protocol` and `general.force_ssl` configuration fields have been replaced with a single `general.public_url` field. Be sure to use a valid url with the new configuration field.