code: protected String createGzipBundleLink(String resourceName, String bundlePrefix, String contextPath,
  			boolean isSslRequest) {
  		// remove '/' from start of name
  		String resource = resourceName.substring(1, resourceName.length());
  		return createBundleLink(BundleRenderer.GZIP_PATH_PREFIX + resource, bundlePrefix, null, contextPath,
  				isSslRequest);
  	}
docs: Creates a link to a bundle in the page, prepending the gzip prefix to its
  identifier.
  
  @param resourceName
  the resource name
  @param bundlePrefix
  the bundle prefix
  @param contextPath
  the context path
  @param isSslRequest
  the flag indicating if it's an SSL request
  @return the link to the gzip bundle in the page