Comment 9 for bug 1695299

There's an unanswered question here ... how did

> "Test@321" in local.conf file.

end up being escaped to %40

> CRITICAL glance [-] Unhandled error: ValueError: invalid interpolation syntax
> in 'mysql+pymysql://root:Test%40321@127.0.0.1/glance?charset=utf8'

? afaict we don't do that anywhere