Disable Hackney URL encoding function

Hackney interferes with out URI encoding and implements older RFC 2396
instead of RFC 3986 which we and Elixir implement. As an example "'"
and "!" will get encoded by it and cause problems with our MediaProxy
making unexpected 302 redirects.

If an admin supplies a different function via *.secret.exs, we
don't override it.

https://github.com/benoitc/hackney/issues/399

lib/pleroma/http/adapter_helper/hackney.ex

@@ -16,7 +16,12 @@ defmodule Pleroma.HTTP.AdapterHelper.Hackney do
 
     config_opts = Pleroma.Config.get([:http, :adapter], [])
 
+    url_encoding =
+      Keyword.new()
+      |> Keyword.put(:path_encode_fun, fn path -> path end)
+
     @defaults
+    |> Keyword.merge(url_encoding)
     |> Keyword.merge(config_opts)
     |> Keyword.merge(connection_opts)
     |> add_scheme_opts(uri)

lib/pleroma/reverse_proxy/client/hackney.ex

@@ -7,6 +7,11 @@ defmodule Pleroma.ReverseProxy.Client.Hackney do
 
   @impl true
   def request(method, url, headers, body, opts \\ []) do
+    opts =
+      Keyword.put_new(opts, :path_encode_fun, fn path ->
+        path
+      end)
+
     :hackney.request(method, url, headers, body, opts)
   end
 

test/pleroma/reverse_proxy_test.exs

@@ -396,7 +396,7 @@ defmodule Pleroma.ReverseProxyTest do
     end
   end
 
-  # Hackey is used for Reverse Proxy when Hackney or Finch is the Tesla Adapter
+  # Hackney is used for Reverse Proxy when Hackney or Finch is the Tesla Adapter
   # Gun is able to proxy through Tesla, so it does not need testing as the
   # test cases in the Pleroma.HTTPTest module are sufficient
   describe "Hackney URL encoding:" do