NGF_CLOSING
#define NG_CLOSING NGF_CLOSING /* compat for old code */
if (node->nd_flags & NGF_CLOSING)
if ((node->nd_flags & NGF_CLOSING) != 0)
node->nd_flags |= NGF_INVALID|NGF_CLOSING;
node->nd_flags &= ~(NGF_INVALID|NGF_CLOSING);