Don't crash on Autobahn testing

src/WebSocket.h

@@ -20,13 +20,15 @@ public:
         // if corkAllocate(size) then corkFree(unused)
 
         // format the response
-        char buf[100];
+        char *buf = (char *) malloc(message.length() + 100);
         int writeLength = WebSocketProtocol<isServer, WebSocket<SSL, isServer>>::formatMessage(buf, message.data(), message.length(), opCode, message.length(), false);
 
 
 
         Super::write(buf, writeLength);
 
+        free(buf);
+
     }
 
     // absolutely not public!