rde_find_prefixset
rde_find_prefixset(r->match.prefixset.name,
rde_find_prefixset(r->match.originset.name,
(old = rde_find_prefixset(new->name, psold)) == NULL) {
struct rde_prefixset *rde_find_prefixset(char *, struct rde_prefixset_head *);