Fix #1249 (#1250)

* Fix behavior for `REVERSE_PROXY` setting when set to a boolean instead of a string

tests/test_config.py

@@ -32,6 +32,18 @@ def test_reverse_proxy_config():
         assert app.wsgi_app.x_prefix == 1
     destroy_ctfd(app)
 
+    class ReverseProxyConfig(TestingConfig):
+        REVERSE_PROXY = True
+
+    app = create_ctfd(config=ReverseProxyConfig)
+    with app.app_context():
+        assert app.wsgi_app.x_for == 1
+        assert app.wsgi_app.x_proto == 1
+        assert app.wsgi_app.x_host == 1
+        assert app.wsgi_app.x_port == 1
+        assert app.wsgi_app.x_prefix == 1
+    destroy_ctfd(app)
+
 
 def test_server_sent_events_config():
     """Test that SERVER_SENT_EVENTS configuration behaves properly"""