Only restart sshd if config changed

tasks/ssh.yml

@@ -5,9 +5,11 @@
     src: etc/ssh/sshd_config
     dest: /etc/ssh/sshd_config
     mode: 0600
+  register: sshd_config
 
 - name: Ensure sshd is started and enabled to start at boot.
   service:
     name: sshd
     state: restarted
     enabled: yes
+  when: sshd_config.changed