More input compatibility love. Support C0 within escape sequences, and the C0 control character VT (vertical tab, \013), which is treated as LF like VT102. Makes another vttest happy.
More input compatibility love. Support C0 within escape sequences, and the C0
control character VT (vertical tab, \013), which is treated as LF like
VT102. Makes another vttest happy.

klaxalk/tmux,klaxalk/tmux,klaxalk/tmux,klaxalk/tmux,klaxalk/tmux