Allow Pleroma.HTTP to connect to raw-HTTP without freaking mint out

lib/pleroma/application.ex

@@ -269,7 +269,6 @@ defmodule Pleroma.Application do
       |> Config.get([])
       |> Pleroma.HTTP.AdapterHelper.add_pool_size(pool_size)
       |> Pleroma.HTTP.AdapterHelper.maybe_add_proxy_pool(proxy)
-      |> Pleroma.HTTP.AdapterHelper.maybe_add_cacerts(:public_key.cacerts_get())
       |> Keyword.put(:name, MyFinch)
 
     [{Finch, config}]

lib/pleroma/http.ex

@@ -62,6 +62,13 @@ defmodule Pleroma.HTTP do
     uri = URI.parse(url)
     adapter_opts = AdapterHelper.options(uri, options || [])
 
+    adapter_opts =
+      if uri.scheme == :https do
+        AdapterHelper.maybe_add_cacerts(adapter_opts, :public_key.cacerts_get())
+      else
+        adapter_opts
+      end
+
     options = put_in(options[:adapter], adapter_opts)
     params = options[:params] || []
     request = build_request(method, headers, options, url, body, params)