GSSAPI name mismatch when connection w/o username and password

In prior versions (e.g., 3.0.3) I could connect to a database with GSSAPI auth without providing a username and a password. The default / currently logged in Kerberos user was used by default.

With version 3.1.3 (and 3.1.2), this no longer works. Instead, I get this error:

`GSSAPI name mismatch, requested 'UNKNOWN_USER', actual name '<name>@<domain>'`

This does not look like a feature, since the Changelog don't contain anything about it.