Merge branch 'snark-post' into 'master'

i2psnark: require POST on all forms

See merge request i2p-hackers/i2p.i2p!224

Author: zzz

apps/i2psnark/java/src/org/klomp/snark/web/I2PSnarkServlet.java

@@ -291,7 +291,9 @@ else if (method.equals("POST"))
 
         String nonce = req.getParameter("nonce");
         if (nonce != null) {
-            if (nonce.equals(String.valueOf(_nonce)))
+            // the clear messages button is a GET
+            if ((method.equals("POST") || "Clear".equals(req.getParameter("action"))) &&
+                nonce.equals(String.valueOf(_nonce)))
                 processRequest(req);
             else  // nonce is constant, shouldn't happen
                 _manager.addMessage("Please retry form submission (bad nonce)");