Don't use quotes on HTTP_PROXY environment URLs

[rfay]

Proposed changes

Currently, I'm not sure how long, the quotes cause havoc with systemd and the config doesn't work. Tested with Ubuntu 22.04 where I ran into this. The hint was from https://forums.docker.com/t/proxy-settings-do-not-work-for-either-etc-default-docker-or-systemd-drop-ins/68891/20

Related issues (optional)

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