Comment 21 for bug 1771914

I actually verified this now, with an even better method: I configured an actual proxy and checked that its log and configured http and https proxies and checked that they were used accordingly.

Versions tested:

# dpkg -l ubuntu-release-upgrader-core update-manager-core
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-=================================================================-=====================================-=====================================-=======================================================================================================================================
ii ubuntu-release-upgrader-core 1:16.04.27 all manage release upgrades
ii update-manager-core 1:16.04.16 all manage release upgrades