Use Symfony Request for comment module

#1: 1999340_1-replace-raw-variables-comment.patch queued for re-testing.

+++ b/core/modules/comment/comment.module
@@ -434,7 +434,7 @@ function comment_permalink(Comment $comment) {
-    $_GET['page'] = $page;
+    Drupal::request()->query->set('page', $page);
     return drupal_container()->get('http_kernel')->handle($subrequest, HttpKernelInterface::SUB_REQUEST);

Slight scope creep, but as long as we're in here let's change drupal_container()->get() to Drupal::service('http_kernel').

Committed to 8.x. Thanks!

+++ b/core/modules/comment/comment.module
@@ -430,12 +430,12 @@ function comment_permalink(Comment $comment) {
     // @todo: Convert the pager to use the request object.
-    $_GET['page'] = $page;
-    return drupal_container()->get('http_kernel')->handle($subrequest, HttpKernelInterface::SUB_REQUEST);
+    $request->query->set('page', $page);
+    return Drupal::service('http_kernel')->handle($subrequest, HttpKernelInterface::SUB_REQUEST);

Should we remove that @todo now or is there something else needed for that?

I think that would require rewriting the pager system, which has needed one for a few years now but still hasn't gotten it. :-(

Does that mean the patch that got committed broke the pager when used on a page with comments? Sorry, I'd check myself, but trying to focus on other issues, so leaving this comment in case someone else wants to investigate.