Effectively revert the previous change: leave the new #include in, but
comment it out with an explanation. This makes it easier for someone
who wants the additional symbols to try re-enabling it for their platform.
diff --git a/Modules/termios.c b/Modules/termios.c
index 0bce7d3..146a16f 100644
--- a/Modules/termios.c
+++ b/Modules/termios.c
@@ -5,7 +5,10 @@
#define PyInit_termios inittermios
#include <termios.h>
+/* XXX Some systems need this to get all the symbols, while
+ this breaks for others.
#include <sys/ioctl.h>
+*/
static char termios__doc__[] = "\
This module provides an interface to the Posix calls for tty I/O control.\n\