mux2tty opens a tty and listens on a TCP port for connections

Data from TCP connections are sent to the tty.  Data from the tty are
sent to all TCP connections.  By default, data are line-buffered and
input from connections are is round-robined.  Turn off round-robining
using --fifo.  Turn off buffering with --delimiter with no argument.
Buffer on something other than lines using the --delimiter option with
a string argument