netbsdlike: add TIOCSCTTY and TIOCSWINSZ ioctls.
Include ioctl commands for becoming controlling tty and setting window
size.  This enables to be built and
run on OpenBSD 6.3.  NetBSD and kin share the same command constants.
@@ -547,6 +547,8 @@ pub const TIOCMBIS: ::c_ulong = 0x8004746c;
pub const TIOCMSET: ::c_ulong = 0x8004746d;
pub const TIOCSTART: ::c_ulong = 0x2000746e;
pub const TIOCSTOP: ::c_ulong = 0x2000746f;
+pub const TIOCSCTTY: ::c_ulong = 0x20007461;
+pub const TIOCSWINSZ: ::c_ulong = 0x80087467;
pub const TIOCM_LE: ::c_int = 0o0001;
pub const TIOCM_DTR: ::c_int = 0o0002;
pub const TIOCM_RTS: ::c_int = 0o0004;
