Issue geerlingguy#83: Add documentation to the https test config. [ci skip]

Author: geerlingguy

https-self-signed/provisioning/templates/https.test.conf.j2

@@ -1,11 +1,14 @@
 # HTTPS Test server configuration.
+
+# Redirect HTTP traffic to HTTPS.
 server {
  listen 80 default_server;
  server_name _;
  index index.html;
  return 301 https://$host$request_uri;
 }
 
+# Serve HTTPS traffic using the self-signed certificate created by Ansible.
 server {
  listen 443 ssl default_server;
  server_name {{ server_hostname }};