Fixe various broken links

content/index.markdown

@@ -396,7 +396,6 @@ tools. Let the Facebook group know if you've built something awesome too!
 * [PHP Consumer](https://github.com/scottmac/opengraph) - A small library for accessing of Open Graph Protocol data in PHP.
 * [OpenGraphNode in PHP](https://buzzword.org.uk/2010/opengraph/#php) - A simple parser for PHP.
 * [PyOpenGraph](https://pypi.python.org/pypi/PyOpenGraph) - A library written in Python for parsing Open Graph protocol information from web sites.
-* [OpenGraph Ruby](https://github.com/intridea/opengraph) - Ruby Gem which parses web pages and extracts Open Graph protocol markup.
 * [OpenGraph for Java](https://github.com/callumj/opengraph-java) - Small Java class used to represent the Open Graph protocol.
 * [RDF::RDFa::Parser](https://search.cpan.org/~tobyink/RDF-RDFa-Parser/lib/RDF/RDFa/Parser.pm) - Perl RDFa parser which understands the Open Graph protocol.
 

index.html

@@ -459,15 +459,14 @@ <h2><a id='implementations' href="#implementations">Implementations</a></h2>
 <li><a href="https://github.com/scottmac/opengraph">PHP Consumer</a> - A small library for accessing of Open Graph Protocol data in PHP.</li>
 <li><a href="https://buzzword.org.uk/2010/opengraph/#php">OpenGraphNode in PHP</a> - A simple parser for PHP.</li>
 <li><a href="https://pypi.python.org/pypi/PyOpenGraph">PyOpenGraph</a> - A library written in Python for parsing Open Graph protocol information from web sites.</li>
-<li><a href="https://github.com/intridea/opengraph">OpenGraph Ruby</a> - Ruby Gem which parses web pages and extracts Open Graph protocol markup.</li>
 <li><a href="https://github.com/callumj/opengraph-java">OpenGraph for Java</a> - Small Java class used to represent the Open Graph protocol.</li>
 <li><a href="https://search.cpan.org/~tobyink/RDF-RDFa-Parser/lib/RDF/RDFa/Parser.pm">RDF::RDFa::Parser</a> - Perl RDFa parser which understands the Open Graph protocol.</li>
 </ul>
 
 <hr />
     </div>
     <div id="footer">
-      <p>The Open Graph protocol was originally created at Facebook and is inspired by <a href="https://en.wikipedia.org/wiki/Dublin_Core">Dublin Core</a>, <a href="https://googlewebmastercentral.blogspot.com/2009/02/specify-your-canonical.html">link-rel canonical</a>, <a href="https://microformats.org/">Microformats</a>, and <a href="https://en.wikipedia.org/wiki/RDFa">RDFa</a>. The specification described on this page is available under the <a href="https://openwebfoundation.org/legal/the-0-9-agreements---necessary-claims">Open Web Foundation Agreement, Version 0.9</a>. This website is <a href="https://github.com/facebook/open-graph-protocol">Open Source</a>. </p>
+      <p>The Open Graph protocol was originally created at Facebook and is inspired by <a href="https://en.wikipedia.org/wiki/Dublin_Core">Dublin Core</a>, <a href="https://developers.google.com/search/blog/2009/02/specify-your-canonical">link-rel canonical</a>, <a href="https://microformats.org/">Microformats</a>, and <a href="https://en.wikipedia.org/wiki/RDFa">RDFa</a>. The specification described on this page is available under the <a href="https://www.openwebfoundation.org/the-agreements/the-owf-0-9-agreements-necessary-claims">Open Web Foundation Agreement, Version 0.9</a>. This website is <a href="https://github.com/facebook/open-graph-protocol">Open Source</a>. </p>
     </div>
     </div>
 

index.php

@@ -57,7 +57,7 @@
       <?php echo $html; ?>
     </div>
     <div id="footer">
-      <p>The Open Graph protocol was originally created at Facebook and is inspired by <a href="https://en.wikipedia.org/wiki/Dublin_Core">Dublin Core</a>, <a href="https://googlewebmastercentral.blogspot.com/2009/02/specify-your-canonical.html">link-rel canonical</a>, <a href="https://microformats.org/">Microformats</a>, and <a href="https://en.wikipedia.org/wiki/RDFa">RDFa</a>. The specification described on this page is available under the <a href="https://openwebfoundation.org/legal/the-0-9-agreements---necessary-claims">Open Web Foundation Agreement, Version 0.9</a>. This website is <a href="https://github.com/facebook/open-graph-protocol">Open Source</a>. </p>
+      <p>The Open Graph protocol was originally created at Facebook and is inspired by <a href="https://en.wikipedia.org/wiki/Dublin_Core">Dublin Core</a>, <a href="https://developers.google.com/search/blog/2009/02/specify-your-canonical">link-rel canonical</a>, <a href="https://microformats.org/">Microformats</a>, and <a href="https://en.wikipedia.org/wiki/RDFa">RDFa</a>. The specification described on this page is available under the <a href="https://www.openwebfoundation.org/the-agreements/the-owf-0-9-agreements-necessary-claims">Open Web Foundation Agreement, Version 0.9</a>. This website is <a href="https://github.com/facebook/open-graph-protocol">Open Source</a>. </p>
     </div>
     </div>