feat: adapt smtprelay role for external use

roles/smtprelay/tasks/stunnel.yml

@@ -0,0 +1,21 @@
+---
+
+- name: Install stunnel
+  package:
+    name: stunnel4
+    state: present
+
+- name: SMTP wrapper
+  template:
+    src: smtp-wrapper.conf.j2
+    dest: /etc/stunnel/smtp-wrapper.conf
+    mode: 0644
+  notify: Restart stunnel4
+
+- name: Rewrite var smtprelay_host
+  set_fact:
+    smtprelay_host: "localhost"
+
+- name: Rewrite var smtprelay_port
+  set_fact:
+    smtprelay_port: "2{{ smtprelay_port }}"