roles/nginx: Re-work vhost template to support HTTPS

Assumes you have a TLS cert for one domain, but not the others, ie:

    http://blah.com \
    http://blah.net  -> https://blah.io
    http://blah.org /

Otherwise, without https, it creates a vhost with all domain names.

Signed-off-by: Alan Orth <alan.orth@gmail.com>

roles/nginx/defaults/main.yml

@@ -7,4 +7,7 @@ nginx_confd_path: /etc/nginx/conf.d
 # parent directory of vhost roots
 nginx_root_prefix: /var/www
 
+# TLS protocol versions to support
+nginx_tls_protocols: TLSv1 TLSv1.1 TLSv1.2
+
 # vim: set ts=2 sw=2: