http_proxy env variable not used by the manager

Concerned version

Version: 2.0.14

Summary

Our documentation states

If the LL::NG server needs a proxy for outgoing connections, then you need to configure some environment variables.

However LWP::UserAgent::env_proxy is only set in some Portal modules, not in the manager or handler

Possible fixes

• Why is env_proxy not set globally? Is it because of handler REST/devops calls?
• We should at least enable env_proxy in the manager or globally in the portal (Auth::REST does not use it by default)
• What about calling reloadUrls
• We could document the fact that PERL_LWP_ENV_PROXY=1 makes LWP use http_proxy globally