-- The <break_msgs> of the listen_on service can be an arbitrary string, in which case messages will be broken on that string (typically "\r\n" for some commands piped from DOS) and each substring used to set <var_name> or passed as an argument to <command_to_call>
-- <cmd_on_dead_pipe> of the listen_on service didn't work in last version. Sorry. -- Size limit on string used to set a variable still 64000; if you expect more than that, use one of <break_msgs> options
