Allow -AcceptSetDesktopSize in x0vncserver

We disabled it in 0a0e582 since it didn't have support for resizing.
But it got that support in 242c5b2, yet we forgot to allow this
setting again.

unix/x0vncserver/x0vncserver.cxx

@@ -206,9 +206,6 @@ int main(int argc, char** argv)
 
   Configuration::enableServerParams();
 
-  // Disable configuration parameters which we do not support
-  Configuration::removeParam("AcceptSetDesktopSize");
-
   for (int i = 1; i < argc; i++) {
     if (Configuration::setParam(argv[i]))
       continue;