[warn] the "ssl" directive is deprecated, use the "listen ... ssl" directive instead (mailhost)

[rhykw]

The ssl on syntax is deprecated since nginx 1.15.
We should only add it if we use nginx 1.14 or older.

A similar problem was reported as #1224.
This problem still remains in mailhost settings.

Affected Puppet, Ruby, OS and module versions/distributions

• Puppet: all
• Ruby: all
• Distribution: all
• Module version: 0.15.0

How to reproduce (e.g Puppet code you use)

class { 'nginx':
  manage_repo    => true,
  package_source => 'nginx-mainline',
  mail           => true,
}
nginx::resource::mailhost { 'domain1.example':
  auth_http   => 'server2.example/cgi-bin/auth',
  protocol    => 'smtp',
  listen_port => 587,
  ssl_port    => 465,
  starttls    => 'only',
  xclient     => 'off',
  ssl         => true,
  ssl_cert    => '/tmp/server.crt',
  ssl_key     => '/tmp/server.pem',
}

What are you seeing

What behaviour did you expect instead

Apply fix like #1225 to mailhost

Output log

2018/12/06 22:32:07 [warn] 25964#25964: the "ssl" directive is deprecated, use the "listen ... ssl" directive instead in /etc/nginx/conf.mail.d/domain1.example:13
2018/12/06 22:32:07 [warn] 25964#25964: the "ssl" directive is deprecated, use the "listen ... ssl" directive instead in /etc/nginx/conf.mail.d/domain1.example:37

Any additional information you'd like to impart

[rhykw]

Fix in #1281