Merge branch 'fix_nextcloud19_smtp' into 'master'

NC19 prefers STARTTLS on port 587

See merge request openappstack/openappstack!375

ansible/roles/apps/templates/settings/nextcloud.yaml

@@ -13,7 +13,7 @@ nextcloud:
       smtp:
         host: "{{ outgoing_mail.smtp.host }}"
         {% if outgoing_mail.smtp.ssl %}
-        secure: "ssl"
+        secure: "tls"
         {% else %}
         secure: ""
         {% endif %}