This is the only reference to lists.fedoraproject.org that I found via http; all others already are https.
Committed. Index: gcc-4.6/porting_to.html =================================================================== RCS file: /cvs/gcc/wwwdocs/htdocs/gcc-4.6/porting_to.html,v retrieving revision 1.8 diff -u -r1.8 porting_to.html --- gcc-4.6/porting_to.html 28 Jun 2015 14:54:03 -0000 1.8 +++ gcc-4.6/porting_to.html 28 Feb 2016 19:42:35 -0000 @@ -109,7 +109,7 @@ <p> Jakub Jelinek, - <a href="http://lists.fedoraproject.org/pipermail/devel/2011-February/148523.html">GCC + <a href="https://lists.fedoraproject.org/pipermail/devel/2011-February/148523.html">GCC 4.6 related common package rebuild failures (was Re: mass rebuild status)</a> </p>