Fix child spawn on FreeBSD.

Fix typo: "#ifdef TIOCSTTY" -> "#ifdef TIOCSCTTY"

Include standard header sys/ioctl.h for ioctl(), needed on MacOS.

Include standard header termios.h for TIOCSCTTY.

Fixes this error on spawn of child shell process:

bash: cannot set terminal process group (-1): Inappropriate ioctl for
device
bash: no job control in this shell

Tested on FreeBSD and Linux.

- Fix #2529

Signed-off-by: Rafael Kitover <rkitover@gmail.com>

kitty/child.c

@@ -12,6 +12,8 @@
 #include <errno.h>
 #include <string.h>
 #include <signal.h>
+#include <sys/ioctl.h>
+#include <termios.h>
 
 static inline char**
 serialize_string_tuple(PyObject *src) {
@@ -93,7 +95,7 @@ spawn(PyObject *self UNUSED, PyObject *args) {
             // Establish the controlling terminal (see man 7 credentials)
             int tfd = open(name, O_RDWR);
             if (tfd == -1) exit_on_err("Failed to open controlling terminal");
-#ifdef TIOCSTTY
+#ifdef TIOCSCTTY
             // On BSD open() does not establish the controlling terminal
             if (ioctl(tfd, TIOCSCTTY, 0) == -1) exit_on_err("Failed to set controlling terminal with TIOCSCTTY");
 #endif