This avoid a redirect, and the trailing slash is technically not needed (per the specification).
Applied, and not queued for a backport. Gerald 2017-01-22 Gerald Pfeifer <ger...@pfeifer.com> * doc/install.texi (Specific): opensource.apple.com uses https now. Remove trailing slash. Index: doc/install.texi =================================================================== --- doc/install.texi (revision 244763) +++ doc/install.texi (revision 244764) @@ -4218,7 +4218,7 @@ Pre-installed versions of Mac OS X may not include any developer tools, meaning that you will not be able to build GCC from source. Tool binaries are available at -@uref{http://opensource.apple.com/}. +@uref{https://opensource.apple.com}. This version of GCC requires at least cctools-590.36. The cctools-590.36 package referenced from