Support for non-standard baudrate settings will be automatically enabled if the termios2 interface is detected available. However, to play it safe, the old and widely supported termios interface will still be used when setting standard baudrates.
Make stdin behave more raw'ish. In particular, don't translate CR -> NL on input.
Add special character map feature
Add a --map option which allows to map special characters, in particular CR and NL characters which are used in various combinations on varios platforms.