Update mcservers to display an error on unknown command. If no command is given then it shows the server status.
Update mcservers to display an error on unknown command. If no command is given
then it shows the server status.

materials-commons/materialscommons.org,materials-commons/materialscommons.org,materials-commons/materialscommons.org,materials-commons/materialscommons.org,materials-commons/materialscommons.org