fix many internal links

Fixed a number of internal links that need to
go to the GitHub site.

Ran `make www` to perform the above.

1992/marangon/README.md

@@ -22,7 +22,7 @@ NOTE: Some compilers have had trouble optimizing this entry.
 
 NOTE: Some systems need to compile with `-ltermcap` as well as `-lcurses`.
 
-NOTE: The original winning source [marangon.orig.c](marangon.orig.c), found in
+NOTE: The original winning source [marangon.orig.c](%%REPO_URL%%/1992/marangon/marangon.orig.c), found in
 the archive directory, assumed that `exit(3)` returns a value which cause
 problems for some systems where `exit(3)` returns a `void`.  The file
 [marangon.c](%%REPO_URL%%/1992/marangon/marangon.c) avoids this problem.