Only import termio.h on OSF, and add a comment about why it is needed there.
This header does not exist on all Unix flavors; FreeBSD in particular does
not include it.
This closes SF bug #422320.
diff --git a/Modules/termios.c b/Modules/termios.c
index d192bfc..cedcb0f 100644
--- a/Modules/termios.c
+++ b/Modules/termios.c
@@ -5,7 +5,11 @@
#define PyInit_termios inittermios
#include <termios.h>
+#ifdef __osf__
+/* On OSF, sys/ioctl.h requires that struct termio already be defined,
+ * so this needs to be included first on that platform. */
#include <termio.h>
+#endif
#include <sys/ioctl.h>
#ifdef __BEOS__