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/kivinen/README.md

@@ -77,7 +77,7 @@ you have with the program.  :-)
 NOTE: Some systems do not need (or have) `-lsocket -lresolv -lnsl`.
 Such systems should compile using `-lX11`.
 
-NOTE: The original winning source [kivinen.orig.c](kivinen.orig.c) assumed that
+NOTE: The original winning source [kivinen.orig.c](%%REPO_URL%%/1992/kivinen/kivinen.orig.c) assumed that
 `exit(3)` returned a value which cause problems for some systems where `exit(3)` returns
 `void`.  The file [kivinen.c](%%REPO_URL%%/1992/kivinen/kivinen.c) avoids this problem.
 

1992/kivinen/index.html

@@ -414,7 +414,7 @@ code.</p>
 you have with the program. :-)</p>
 <p>NOTE: Some systems do not need (or have) <code>-lsocket -lresolv -lnsl</code>.
 Such systems should compile using <code>-lX11</code>.</p>
-<p>NOTE: The original winning source <a href="kivinen.orig.c">kivinen.orig.c</a> assumed that
+<p>NOTE: The original winning source <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1992/kivinen/kivinen.orig.c">kivinen.orig.c</a> assumed that
 <code>exit(3)</code> returned a value which cause problems for some systems where <code>exit(3)</code> returns
 <code>void</code>. The file <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1992/kivinen/kivinen.c">kivinen.c</a> avoids this problem.</p>
 <h2 id="authors-remarks">Author’s remarks:</h2>