Replace http://man7.org links with https://man7.org links.

I suspect the way http:// dies is that browsers just interpret it as
https:// anyway, but there's no reason not to just bulk fix all these at
source.

Change-Id: I38fa91728846d7c33207ef1bdadd4910eac9e941
diff --git a/libc/include/bits/ioctl.h b/libc/include/bits/ioctl.h
index 260eb7d..ae75880 100644
--- a/libc/include/bits/ioctl.h
+++ b/libc/include/bits/ioctl.h
@@ -38,7 +38,7 @@
 __BEGIN_DECLS
 
 /**
- * [ioctl(2)](http://man7.org/linux/man-pages/man2/ioctl.2.html) operates on device files.
+ * [ioctl(2)](https://man7.org/linux/man-pages/man2/ioctl.2.html) operates on device files.
  */
 int ioctl(int __fd, int __op, ...);