Resolve "add smtp relay"

Closes #31 (closed)

defaults/main.yml

@@ -36,6 +36,15 @@ ynh_users: null
   #   lastname: Doe
   #   mail_domain: domain.tld
 
+# SMTP custom settings ( Only override if you need a SMTP relay)
+ynh_smtp_get_cli: yunohost settings get smtp.relay
+ynh_smtp_set_cli: yunohost settings set smtp.relay
+ynh_new_smtp_relay: null
+  #   host: smtp.domain.tld
+  #   port: 25
+  #   user: user1
+  #   password: Pa$$w0rd
+
 # The list of Yunohost apps.
 ynh_apps: null
   # - label: Tiny Tiny RSS