bug 347481: find link tags in XHTML documents (where the link tag is in the default namespace) in addition to HTML documents

namespace)
Patch by Justin Dolske.
r=myk

browser/components/microsummaries/src/nsMicrosummaryService.js

@@ -1730,7 +1730,7 @@ MicrosummarySet.prototype = {
     // XXX Handle XML documents, whose microsummaries are specified
     // via processing instructions.
 
-    var links = resource.content.getElementsByTagName("LINK");
+    var links = resource.content.getElementsByTagName("link");
     for ( var i = 0; i < links.length; i++ ) {
       var link = links[i];