monitor: improve auto complete of "help" for single command in sub group Now special case "help *" in auto completion can work with sub commands, such as "help info u*". Signed-off-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>