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/sys/personality.h b/libc/include/sys/personality.h
index 9eb992f..34d1a1a 100644
--- a/libc/include/sys/personality.h
+++ b/libc/include/sys/personality.h
@@ -39,7 +39,7 @@
 __BEGIN_DECLS
 
 /**
- * [personality(2)](http://man7.org/linux/man-pages/man2/personality.2.html) sets the calling
+ * [personality(2)](https://man7.org/linux/man-pages/man2/personality.2.html) sets the calling
  * process' personality.
  *
  * Returns the previous persona on success, and returns -1 and sets `errno` on failure.