[feature request] Add ability for HTTP Config Manager to take proxy options

[rloomba]

I propose adding the following options to HTTP Config manager:

name	default	description
proxy_host	nil	To perform a web request behind a proxy, this is required. This can be a domain or IP address of the proxy server.
proxy_port	nil	port number that the proxy server uses for client connections.
proxy_username	nil	username for proxy auth.
proxy_password	nil	password for proxy auth.

Happy to submit a PR to add this functionality.

[jasonkarns]

#211 would also solve this as net/http and open-uri both respect http proxy env vars automatically.

[Tamara-Barum]

My apologies for the significant delay in response to this issue. The team is updating our processes and reviewing all open issues and PR's.
Following the links I believe part of this is complete, however not all of the request is covered. If this Feature Request is still relevant, please add your suggestion to our idea portal here https://feedback.optimizely.com/ where it can be evaluated with the other ideas for the product. From here it will be appropriately prioritized and brought to the engineering team.