correct application of hupcl option
correct application of hupcl option

HUPCL is a TTY control flag, not an FCNTL flag.  Remove its effect on
open(2), and instead apply it tcsetattr(3).

Signed-off-by: Peter A. Bigot <650538893330be855f76604594b4820eb226769e@pabigot.com>

munyirik/node-serialport,ms-iot/node-serialport,rhuehn/node-serialport,giseburt/node-serialport,EmergingTechnologyAdvisors/node-serialport,ms-iot/node-serialport,voodootikigod/node-serialport,node-serialport/node-serialport,giseburt/node-serialport,giseburt/node-serialport,node-serialport/node-serialport,voodootikigod/node-serialport,munyirik/node-serialport,node-serialport/node-serialport,ms-iot/node-serialport,EmergingTechnologyAdvisors/node-serialport,voodootikigod/node-serialport,munyirik/node-serialport,voodootikigod/node-serialport,node-serialport/node-serialport,EmergingTechnologyAdvisors/node-serialport,ms-iot/node-serialport,ms-iot/node-serialport,giseburt/node-serialport,EmergingTechnologyAdvisors/node-serialport,EmergingTechnologyAdvisors/node-serialport,munyirik/node-serialport,rhuehn/node-serialport,node-serialport/node-serialport,rhuehn/node-serialport,rhuehn/node-serialport