code: public @Nullable Scriptable jsFunction_headers(String name) {
  		Context cx = Context.getCurrentContext();
  		Header[] hs = req.getHeaders(name);
  		Scriptable result = RHINO.newArray(cx, getParentScope());
  		int i = 0;
  		for (Header h : hs) {
  			Scriptable jsh = makeJsHeader(cx, h);
  			RHINO.putProperty(result, i++, jsh);
  		}
  		return result;
  	}
docs: [] or [{name:..., value:...},{name:..., value:...}]