Comment 30 for bug 1713803

dhcpcd5 is redundant as a DHCP implementation in Ubuntu; but it does "integrate" with resolvconf by way of its own shipped dhcpcd-hooks/20-resolv.conf. It does check before calling 'resolvconf -a' and 'resolvconf -d' to add/remove its own interface file; and uses this hook file in order to integrate nicely with VPN clients and/or local nameservers.

Setting to Confirmed, the package should be fixed eventually to play nice with systemd-resolved.