Remoting server side/client side

Hej !

When an error occurs on server side, remoting often reports me "Class not found " without any class name. I get that as response : "hxrxcy0:g" which means haxe remotin, exception, class, and 0 length string so no class name.
in order to get the real exception that occurs on server side I've changed that line :
https://github.com/HaxeFoundation/hx3compat/blob/master/std/haxe/remoting/HttpConnection.hx#L108 from : `s.serializeException(e);` to `s.serializeException(Std.string(e));`

Start in std/haxe/remoting/HttpConnection.hx at line 108 and inspect how serializeException encodes the server-side error. Compare the current response with the reported hxrxcy0:g output and the suggested Std.string(e) change. Done means the client receives the server exception details instead of an empty class name, with relevant remoting behavior verified.

Written by the indexing model from the issue text.