PF_CHANGE_ADD_HEAD
if (pcr->action < PF_CHANGE_ADD_HEAD ||
if (pcr->action == PF_CHANGE_ADD_HEAD)
else if (pcr->action == PF_CHANGE_ADD_HEAD ||
if (pca->action < PF_CHANGE_ADD_HEAD ||
if (pca->action == PF_CHANGE_ADD_HEAD)
else if (pca->action == PF_CHANGE_ADD_HEAD ||