Fix pam mkhomedir

The config file is provided by pam-modules, but with Default: no.
We need to call pam-auth-update to enable or disable it.

ssh-server/handlers/main.yml

@@ -4,8 +4,3 @@
   service:
     name: ssh
     state: restarted
-
-- name: regenerate pam config
-  command: pam-auth-update --force
-  environment:
-    DEBIAN_FRONTEND: noninteractive

ssh-server/tasks/main.yml

@@ -46,16 +46,20 @@
   tags:
     - ssh
 
-- name: ensure pam creates a home dir if necessary
-  copy:
-    src: pam/mkhomedir
-    dest: /usr/share/pam-configs/mkhomedir
-    owner: root
-    group: root
-    mode: '0644'
+- name: ensure pam creates a home directory
+  command: pam-auth-update --enable mkhomedir --force
+  environment:
+    DEBIAN_FRONTEND: noninteractive
   when: ssh_mkhomedir
-  notify:
-    - regenerate pam config
+  tags:
+    - ssh
+    - pam
+
+- name: ensure pam doesn't create a home directory
+  command: pam-auth-update --remove mkhomedir --force
+  environment:
+    DEBIAN_FRONTEND: noninteractive
+  when: not ssh_mkhomedir
   tags:
     - ssh
     - pam