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/alloca.h b/libc/include/alloca.h
index e05dea6..2786e2f 100644
--- a/libc/include/alloca.h
+++ b/libc/include/alloca.h
@@ -36,7 +36,7 @@
#include <sys/cdefs.h>
/**
- * [alloca(3)](http://man7.org/linux/man-pages/man3/alloca.3.html) allocates space on the stack.
+ * [alloca(3)](https://man7.org/linux/man-pages/man3/alloca.3.html) allocates space on the stack.
*
* New code should not use alloca because it cannot report failure.
* Use regular heap allocation instead.