ee10 DefaultServlet suffix mappings do not work

[janbartel]

jetty-12.0.x

Jetty Environment
ee10

A setup like:

        ServletContextHandler context = new ServletContextHandler();
        context.setContextPath("/blah");
        ServletHolder holderAlt = new ServletHolder("static-alt", DefaultServlet.class);
        holderAlt.setInitParameter("resourceBase", "/tmp/static-alt/");
        context.addServlet(holderAlt, "*.js");

For a request such as:

GET http://localhost/blah/foo.js

Results in a call to DefaultServlet:

protected String getEncodedPathInContext(HttpServletRequest req, String includedServletPath)
  {
      if (includedServletPath != null)
          return encodePath(getIncludedPathInContext(req, includedServletPath, !isDefaultMapping(req)));
      else if (!isDefaultMapping(req))
          return encodePath(req.getPathInfo());

The Request.getPathInfo() on a suffix match returns null. The path that is encoded in this case should be eg /foo.js

[janbartel]

This should be fixed by the introduction of the ResourceServlet in #11933