Update manpage to mention you can run targetcli cmd
Update manpage to mention you can run targetcli cmd

Instead of entering the command shell, you can also do e.g. "targetcli ls"
and it will execute that command and not enter the shell.

Signed-off-by: Andy Grover <b7d524d2f5cc5aebadb6b92b08d3ab26911cde33@redhat.com>

Datera/targetcli,Datera/targetcli