PHP: gadgets.util.sanitizeHtml does not work anymore

Currently the workaround (see https://issues.apache.org/jira/browse/SHINDIG-346?focusedCommentId=12730591&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#action_12730591) to make gadgets.util.sanitizeHtml work in PHP (the Caja Maven dependency is not available and the res:// links in the feature registry do not work therefor) does not work anymore because the linked html-sanitizer.js from the Caja trunk depends on the html4 package now.
This dependency is only resolved after building the minified JS files.

In order to fix this issue I built the files linked in the feature registry and put them under php/external/resources/. The PHP GadgetFeatureRegistry now resolves all res:// links to be included through a child class of the FilesServlet which then loads the correct file out of the external package.

[Paul Lindner, 2010-08-24 14:35:57]

Looks good, I'd add caja to the php/NOTICE and /NOTICE files to indicate that
we're embedding that code in our source tree.

[bashofmann, 2010-08-24 15:29:55]

just saw, that i had forgotten one hardcoded URL in the GadgetFeatureRegistry