Merge branch '2.3' into 2.7

* 2.3:
  updated VERSION for 2.3.42
  update CONTRIBUTORS for 2.3.42
  updated CHANGELOG for 2.3.42
  Revert "bug #18908 [DependencyInjection] force enabling the external XML entity loaders (xabbuh)"
  Partial revert of previous PR
  [DependencyInjection] Skip deep reference check for 'service_container'
  Catch \Throwable
  [Serializer] Add missing @throws annotations
  Fix for #18843
  force enabling the external XML entity loaders
  Removed UTC specification with timestamp

Author: fabpot

Routing/DelegatingLoader.php

@@ -77,6 +77,9 @@ public function load($resource, $type = null)
         } catch (\Exception $e) {
             $this->loading = false;
             throw $e;
+        } catch (\Throwable $e) {
+            $this->loading = false;
+            throw $e;
         }
 
         $this->loading = false;
@@ -85,7 +88,7 @@ public function load($resource, $type = null)
             if ($controller = $route->getDefault('_controller')) {
                 try {
                     $controller = $this->parser->parse($controller);
-                } catch (\Exception $e) {
+                } catch (\InvalidArgumentException $e) {
                     // unable to optimize unknown notation
                 }