other doclets cannot use standard doclet parameters

I am using ydoc, an extension to the standard doclet. A new check in the javadoc plugin prevents the use of the standard doclet parameters

<j:if test="${context.getVariable('maven.javadoc.doclet') == null>

You should probably create another parameter (ex. maven.javadoc.usestandardparameters) that could override this behavior for doclets that extend the standard doclet.