Fixed bug when server is behind a proxy (#169)

Avoid using the domain and protocol from the request URL, instead use the path and the URL parameters.

Author: GramThanos

src/flask_pyoidc/flask_pyoidc.py

@@ -114,7 +114,7 @@ def _authenticate(self, client, interactive=True):
         if not client.is_registered():
             self._register_client(client)
 
-        flask.session['destination'] = flask.request.url
+        flask.session['destination'] = flask.request.full_path
 
         # Use silent authentication for session refresh
         # This will not show login prompt to the user