I'm on a system with dual-dhclient-daemon, but it seems to also happen with the standard dclient. My /etc/resolvconf.conf gets completely ignored. First, I tried setting additional nameservers in there using the "name_servers" and "name_servers_append" config options. They did not get added after a reboot. I tried manually putting my nameservers into /etc/resolv.conf and putting "resolvconf=NO" into /etc/resolvconf.conf. Again, this had no effect, the resolv.conf got overwritten. Ultimately, I added resolv_conf=/dev/null, but again, this got ignored and the resolv.conf overwritten. My workaround is to overwrite resolv.conf in my rc.local, but that's not a solution.