new_prefix_set
static struct prefixset *new_prefix_set(char *, int);
if ((curpset = new_prefix_set($2, 0)) == NULL) {
if ((curpset = new_prefix_set($2, 0)) == NULL) {
if ((curoset = new_prefix_set($2, 1)) == NULL) {
if ((curoset = new_prefix_set($2, 1)) == NULL) {