rrset_markdel
slabhash_setmarkdel(&r->table, &rrset_markdel);
void rrset_markdel(void* key);
else if(fptr == &rrset_markdel) return 1;
slabhash_setmarkdel(&r->table, &rrset_markdel);
void rrset_markdel(void* key);
else if(fptr == &rrset_markdel) return 1;