Actually fix upload limit on OTP releases

Closes #1109

lib/pleroma/web/endpoint.ex

@@ -61,7 +61,17 @@ defmodule Pleroma.Web.Endpoint do
   plug(Plug.RequestId)
   plug(Plug.Logger, log: :debug)
 
-  plug(Pleroma.Plugs.Parsers)
+  plug(Plug.Parsers,
+    parsers: [
+      :urlencoded,
+      {:multipart, length: {Pleroma.Config, :get, [[:instance, :upload_limit]]}},
+      :json
+    ],
+    pass: ["*/*"],
+    json_decoder: Jason,
+    length: Pleroma.Config.get([:instance, :upload_limit]),
+    body_reader: {Pleroma.Web.Plugs.DigestPlug, :read_body, []}
+  )
 
   plug(Plug.MethodOverride)
   plug(Plug.Head)