Release 7.4.2: Disabled debugging output in default configuration for Kerberos authentication

[Guest]

The shipped configuration examples for the Kerberos authentication configures debug logging output. This should not be the default for shipped components.

The option for debugging the Kerberos implementation of the JDK is now configured to false by default. Therefore the property sun.security.krb5.debug is now set to false in configuration file /opt/open-xchange/etc/kerberos.properties.

The option for debugging the two example principals is now configured to false. Therefore both properties named debug in configuration file /opt/open-xchange/etc/kerberosLogin.conf are now set to false.