first commit

core/modules/ban/ban.services.yml

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+services:
+  ban.ip_manager:
+    class: Drupal\ban\BanIpManager
+    arguments: ['@database']
+    tags:
+      - { name: backend_overridable }
+  Drupal\ban\BanIpManagerInterface: '@ban.ip_manager'
+  ban.middleware:
+    class: Drupal\ban\BanMiddleware
+    arguments: ['@ban.ip_manager']
+    tags:
+      # Ensure to come before page caching, so you don't serve cached pages to
+      # banned users.
+      - { name: http_middleware, priority: 250 }