vpnc and vpnc-scripts check for existance of /sbin/resolvconf and only Suggests: resolvconf. DNS integration by modifying /etc/resolv.conf (and thus the systemd symlink) should work appropriately and let systemd-resolved know about the new nameservers.
vpnc and vpnc-scripts check for existance of /sbin/resolvconf and only Suggests: resolvconf. DNS integration by modifying /etc/resolv.conf (and thus the systemd symlink) should work appropriately and let systemd-resolved know about the new nameservers.