Add upnp port mapping description (#2354)
Add upnp port mapping description (#2354)


clemahieu/raiblocks,clemahieu/raiblocks,clemahieu/raiblocks,SergiySW/raiblocks,SergiySW/raiblocks,SergiySW/raiblocks,clemahieu/raiblocks,SergiySW/raiblocks,clemahieu/raiblocks,SergiySW/raiblocks,clemahieu/raiblocks