Respect proxy settings federation

lib/pleroma/http/connection.ex

@@ -32,9 +32,11 @@ defmodule Pleroma.HTTP.Connection do
   defp hackney_options(opts) do
     options = Keyword.get(opts, :adapter, [])
     adapter_options = Pleroma.Config.get([:http, :adapter], [])
+    proxy_url = Pleroma.Config.get([:http, :proxy_url], nil)
 
     @hackney_options
     |> Keyword.merge(adapter_options)
     |> Keyword.merge(options)
+    |> Keyword.merge(proxy: proxy_url)
   end
 end