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/times.h b/libc/include/sys/times.h
index 8b6e91d..ac6ec18 100644
--- a/libc/include/sys/times.h
+++ b/libc/include/sys/times.h
@@ -40,7 +40,7 @@
 __BEGIN_DECLS
 
 /**
- * [times(2)](http://man7.org/linux/man-pages/man2/times.2.html) fills a buffer with the
+ * [times(2)](https://man7.org/linux/man-pages/man2/times.2.html) fills a buffer with the
  * calling process' CPU usage.
  *
  * Returns a (possibly overflowed) absolute time on success,