Fix validation to work with arrays

  # Validate our inputs

  # Hostnames

  unless (is_domain_name($server) or is_ip_address($server)) {

    fail('$server must be a valid hostname or IP address')

  unless is_array($server) {

    fail('$server must be an array of hostnames or IP addresses')

  }

  # Fake booleans (FR uses yes/no instead of true/false)