message: Simplify checking empty IpRange
diff: @@ -92,8 +92,8 @@ impl Rules {
  /// Check if there are no rules for the corresponding DNS query type
  fn is_rule_empty_for_qtype(&self, qtype: RecordType) -> bool {
  match qtype {
  - RecordType::A => self.ipv4.iter().peekable().peek().is_none(),
  - RecordType::AAAA => self.ipv6.iter().peekable().peek().is_none(),
  + RecordType::A => self.ipv4.iter().next().is_none(),
  + RecordType::AAAA => self.ipv6.iter().next().is_none(),
  _ => true
  }
  }
  