GWT 2.8-SNAPSHOT has broken JSP support in SDM & DM

Hi Guys,
After updating to Jetty 9.2 in GWT 2.8 the JSP support is not working any more during debug (it doesn't matter if you use SDM o DM).
It seems that since Jetty 9.2[1] jsp support is not enabled by default and need to enabled when embedding. As a workaround you can add this snippet[2] to web.xml.
I don't know if I this expected or I should fill a bug.

[1] http://www.eclipse.org/jetty/documentation/current/configuring-jsp.html

[2] Code Snippet
 <servlet id="jsp">
    <servlet-name>jsp</servlet-name>
    <servlet-class>org.apache.jasper.servlet.JspServlet</servlet-class>
    <init-param>
        <param-name>logVerbosityLevel</param-name>
        <param-value>DEBUG</param-value>
    </init-param>
    <init-param>
        <param-name>fork</param-name>
        <param-value>>false</param-value>
    </init-param>
    <init-param>
        <param-name>keepgenerated</param-name>
        <param-value>>true</param-value>
    </init-param>
    <load-on-startup>0</load-on-startup>
  </servlet>
 
  <servlet-mapping>
    <servlet-name>jsp</servlet-name>
    <url-pattern>*.jsp</url-pattern>
    <url-pattern>*.jspf</url-pattern>
    <url-pattern>*.jspx</url-pattern>
    <url-pattern>*.xsp</url-pattern>
    <url-pattern>*.JSP</url-pattern>
    <url-pattern>*.JSPF</url-pattern>
    <url-pattern>*.JSPX</url-pattern>
    <url-pattern>*.XSP</url-pattern>
  </servlet-mapping>