Comment 1 for bug 1766971

Grepping the installer log shows only this for my proxy input:

2018-04-25 20:18:44,505 subiquity.installpath:60 User input: {'url': 'http://ds216.lowtech:3128/'}

It's also in here:
subiquity-curtin-install.conf:proxy: {http_proxy: 'http://ds216.lowtech:3128/', https_proxy: 'http://ds216.lowtech:3128/'}

and in the installer-journal:
installer-journal.txt:Apr 25 20:18:54 ubuntu-server curtin_log.1862[2165]: merged config: {'sources': {'rofs': 'cp:///media/filesystem'}......'proxy': {'http_proxy': 'http://ds216.lowtech:3128/', 'https_proxy': 'http://ds216.lowtech:3128/'},

And in these:
curtin-install-cfg.yaml: http_proxy: http://ds216.lowtech:3128/
curtin-install-cfg.yaml: https_proxy: http://ds216.lowtech:3128/