fix guest CLI: support old signature
In version 0.11.0 the signature of the guest subcommand had changed. This leads to unneccessary problems, e.g. -l now stands for leitzahl, not lastname.
To receive notifications about scheduled maintenance, please subscribe to the mailing-list gitlab-operations@sympa.ethz.ch. You can subscribe to the mailing-list at https://sympa.ethz.ch
In version 0.11.0 the signature of the guest subcommand had changed. This leads to unneccessary problems, e.g. -l now stands for leitzahl, not lastname.