Merged branch 'jetty-12.0.x' into 'fix/jetty-12.0.x/httpsender-proxy-…

…continue-fixes'.

Signed-off-by: Simone Bordet <simone.bordet@gmail.com>

jetty-ee9/jetty-ee9-proxy/src/main/java/org/eclipse/jetty/ee9/proxy/AbstractProxyServlet.java

@@ -771,6 +771,14 @@ protected void sendProxyResponseError(HttpServletRequest clientRequest, HttpServ
         }
     }
 
+    /**
+     * <p>Returns the action to perform when the proxy receives
+     * a 100 Continue response from the server.</p>
+     *
+     * @param clientRequest the client request
+     * @param proxyRequest the request being proxied
+     * @return the 100 Continue action to run
+     */
     protected Runnable onContinue(HttpServletRequest clientRequest, Request proxyRequest)
     {
         return null;