Superuser can also execute contact info commands. AuthInfo is no longer checked in the input and always displayed in the output as the only ones who can get a response are the sponsoring registrar and super user.
Also corrected a Javadoc in which '@' should have been escaped (see https://reflectoring.io/howto-format-code-snippets-in-javadoc/)
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=199521153