bring server into and out of curses raw/cooked mode
VtControl [ options ]
This command is used only in the character mode server. It is used to
bring the server in and out of curses raw/cooked mode. (In cooked mode, the
server preprocesses keyboard input to the application process; in raw mode,
all keypresses are transmitted directly.)
Resumes the character mode server and sets curses to raw mode.
Suspends the character mode server and sets curses to cooked mode.