Add alt code to 2011/richards + format/typo checks

The alt code is a starting point for macOS should anyone be brave enough
to try solving the problem of running mmap()d code. This does appear to
be an arm64 thing so anyone trying it will have to have a Mac with the
silicon chips. The bugs.md and thanks file both link to it.

Format/typo check README.md.

bugs.md

@@ -2480,7 +2480,9 @@ memory protections with the arm64 processor.
 workarounds but at this time he could not get it to work. He offers some earlier
 debugging sessions below as well as a resource from the author as well as some
 resources on Apple's website should anyone wish to take a crack at it. He might
-address it later.
+address it later but a starting point might be in
+[richards.alt.c](2011/richards/richards.alt.c).
+
 
 ### Debugging