ifupdown expecting upstart where systemd exists

[flickerfly]

I was doing an upgrade of a few utilities and noticed them output when ifupdown was upgrading.

Setting up ifupdown (0.8.10ubuntu1.2) ...
initctl: Unable to connect to Upstart: Failed to connect to socket /com/ubuntu/upstart: Connection refused
insserv: warning: script 'screen-cleanup' missing LSB tags and overrides
insserv: Default-Start undefined, assuming empty start runlevel(s) for script `screen-cleanup'
insserv: Default-Stop undefined, assuming empty stop runlevel(s) for script `screen-cleanup'
Setting up initramfs-tools-bin (0.122ubuntu8.7) ...

After the upgrade I ran `status ifpudown` and received one of the same complaints.

$ sudo status ifupdown
status: Unable to connect to Upstart: Failed to connect to socket /com/ubuntu/upstart: Connection refused

The same output occurs if I run this against networking.

$ sudo status networking
status: Unable to connect to Upstart: Failed to connect to socket /com/ubuntu/upstart: Connection refused

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ifupdown 0.8.10ubuntu1.2
ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16
Uname: Linux 4.4.0-36-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.4
Architecture: amd64
Date: Thu Dec 22 07:53:25 2016
InstallationDate: Installed on 2012-12-29 (1454 days ago)
InstallationMedia: Ubuntu-Server 12.04 LTS "Precise Pangolin" - Release amd64 (20120424.1)
ProcEnviron:
 TERM=screen
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ifupdown
UpgradeStatus: Upgraded to xenial on 2016-08-04 (139 days ago)

[flickerfly (josiah-ritchie)]

Also, I've been able to repeat this on multiple 16.04 machines.