Move ssl_redirect into a location

[SaschaDoering]

Fixes GH-1347

Pull Request (PR) description

This makes it possible to define locations that are accepted over HTTP and only forward everything else to HTTPS. This allows, for example, to configure something like this:

nginx::resource::server { 'www.puppetlabs.com':
  ensure       => present,
  ssl          => true,
  ssl_cert     => '/etc/pki/tls/certs/blah.cert',
  ssl_key      => '/etc/pki/tls/private/blah.key',
  ssl_redirect => true,
  www_root     => '/var/www/www.puppetlabs.com',
}

nginx::resource::location { 'letsencrypt':
  location    => '^~ /.well-known/acme-challenge/',
  www_root    => '/var/www/letsencrypt',
  index_files => [],
  ssl         => false,
  server      => ['www.puppetlabs.com'],
}

Which results in a server accepting LetsEncrypt Challanges on HTTP and redirect everything else to HTTPS.

This Pull Request (PR) fixes the following issues

Fixes #1347