Huge role refactoring/cleanup. Other commits will propably follow. Because some bugs will exist. Still important for longrun and also for auto docs/help/slideshow generation

roles/web-app-nextcloud/templates/config/memcache.config.php.j2

@@ -0,0 +1,14 @@
+<?php
+
+# Implementing redis configuration
+return array (
+  # For single server setup APCu is recommended, for multi server setup Redis
+  'memcache.local' => '\\OC\\Memcache\\{% if deployment_mode == "single" %}APCu{% else %}Redis{% endif %}',
+  # The following lines are configured via the environment variables
+  # 'memcache.locking' => '\\OC\\Memcache\\Redis',
+  # 'redis' =>
+  # array (
+  #   'host' => 'redis',
+  #   'port' => 6379,
+  # )
+);