Update to Drupal 8.0-dev-2015-11-17. Commits through da81cd220, Tue Nov 17 15:53:49 2015 +0000, Issue #2617224 by Wim Leers: Move around/fix some documentation.

core/lib/Drupal/Core/DrupalKernel.php

@@ -821,13 +821,6 @@ class DrupalKernel implements DrupalKernelInterface, TerminableInterface {
     // If there is no container and no cached container definition, build a new
     // one from scratch.
     if (!isset($container) && !isset($container_definition)) {
-      if (version_compare(phpversion(), '7.0.0-dev') >= 0) {
-        // The service graph implementation is prone to corruption during GC.
-        // Collect cycles now then disable the GC for the time of the compiler
-        // run.
-        // @see https://bugs.php.net/bug.php?id=70805
-        gc_collect_cycles();
-      }
       $container = $this->compileContainer();
 
       // Only dump the container if dumping is allowed. This is useful for