Testing non-ASCII domains

This is a test #WriteFreely instance on a non-ASCII domain: https://bär.writefreely.dev. This is supported by changes in #457, which automatically converts a Unicode host name for a WF instance into its Punycode representation, which is then used throughout the application, including for ActivityPub requests. As such, this blog should function just fine in the #fediverse! Feedback? Reply and mention @matt@writing.exchange.