ovpn_get_hash_head
nhead = ovpn_get_hash_head(peer->ovpn->peers->by_transp_addr,
head = ovpn_get_hash_head(ovpn->peers->by_id, &peer_id,
nhead = ovpn_get_hash_head(peer->ovpn->peers->by_vpn_addr4,
nhead = ovpn_get_hash_head(peer->ovpn->peers->by_vpn_addr6,
nhead = ovpn_get_hash_head(ovpn->peers->by_transp_addr, &sa,
ovpn_get_hash_head(ovpn->peers->by_id, &peer->id,