Writing our own sysctl.d file instead of updating /etc/sysctl.conf directly

roles/rear_backup/tasks/main.yml

@@ -61,11 +61,15 @@
   when:
     - rear_config_stat['stat']['exists'] | bool
 
-- name: Disable IPv6 for future reboots if requested
+- name: Disable IPv6 per survey choice
   ansible.builtin.lineinfile:
-    path: /etc/sysctl.conf
+    create: true
+    path: /etc/sysctl.d/42-ipv6-disable.conf
     line: "net.ipv6.conf.all.disable_ipv6 = 1"
     state: present
+    owner: root
+    group: root
+    mode: '0644'
   when:
     - rear_ipv6_disable_on_boot | default(false) | bool