Indeed, several mechanisms for passing this stuff to programs do exactly that. Notice that they are two distinct command-line arguments to these programs, for

Indeed, several mechanisms for passing this stuff to programs do exactly that. Notice that they are two distinct command-line arguments to these programs, for examples: * http://jdebp.eu./Softwares/nosh/guide/tcp-socket-listen.html http://jdebp.eu./Softwares/nosh/guide/tcp-socket-listen.html * https://cr.yp.to/ucspi-tcp/tcpserver.html https://cr.yp.to/ucspi-tcp/tcpserver.html One of the principles underlying this design was, famously, "Don't parse". Don't have one string with a separator character. Have two strings that are already separate. * http://cr.yp.to/qmail/guarantee.html http://cr.yp.to/qmail/guarantee.html