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.

2001/bellard/index.html

@@ -418,7 +418,8 @@ program.</p>
 <p>An alternate syntax is to use it as a script interpreter: you can
 put <code>#!/usr/local/bin/otcc</code> at the beginning of your C source if
 you installed <code>otcc</code> at this place.</p>
-<h3 id="supported-c-language-subset-read-joint-example-bellard.otccex.c-to-have-an-introduction-to-otcc-dialect">Supported C language subset (read joint example <a href="bellard.otccex.c">bellard.otccex.c</a> to have an introduction to <code>OTCC</code> dialect)</h3>
+<h3 id="supported-c-language-subset">Supported C language subset</h3>
+<p>Read joint example <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2001/bellard/bellard.otccex.c">bellard.otccex.c</a> to have an introduction to <code>OTCC</code> dialect.</p>
 <h4 id="expressions">Expressions:</h4>
 <ul>
 <li><p>binary operators, in decreasing precedence order: <code>*</code> <code>/</code> <code>%</code>,