In order to redirect the user after authentication, Authelia uses
rd query parameter provided by the proxy. However an attacker could
use phishing to make the user be redirected to a bad domain. In order
to avoid the user to be redirected to a bad location, Authelia now
verifies the redirection URL is under the protected domain.
Before this patch, when Authelia started, if Mongo was not
up and running, Authelia failed to connect and never retried.
Now, everytime Authelia faces a broken connection, it tries
to reconnect during the next operation.
