resolvconf not populated after ipconfig

Steps:
* make sure your initrd has your network card modules
* add ip=dhcp to your kernel command line
* add "iface $iface inet manual" to /etc/network/interfaces
* reboot

Expected:
* you're networked on boot

Current:
* resolvconf is not populated so you don't get name resolution

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: klibc-utils 2.0.4-8ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-22.39-generic 4.4.8
Uname: Linux 4.4.0-22-generic x86_64
NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
CurrentDesktop: Unity
Date: Fri May 13 19:29:23 2016
Dependencies: libklibc 2.0.4-8ubuntu1
InstallationDate: Installed on 2016-05-06 (6 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
SourcePackage: klibc
UpgradeStatus: No upgrade log present (probably fresh install)