rem: return RegisterFilterObj(itPtr, NS_FILTER_VOID_TRACE, objv + 1);
add: RegisterFilterObj(itPtr, NS_FILTER_VOID_TRACE, objc - 1, objv + 1); return TCL_OK;
context: NsTclRegisterTraceObjCmd(ClientData arg, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]){    NsInterp *itPtr = arg;    if (objc != 4 && objc != 5) {        Tcl_WrongNumArgs(interp, 1, objv, "method urlPattern script ?arg?");        return TCL_ERROR;    }    return RegisterFilterObj(itPtr, NS_FILTER_VOID_TRACE, objv + 1);}