Merge pull request EmilHernvall#11 from Dirbaio/patch-1

Fix typo in label max length

chapter2.md

@@ -57,7 +57,7 @@ We'll also need a function for writing query names in labeled form:
  fn write_qname(&mut self, qname: &str) -> Result<()> {
  for label in qname.split('.') {
  let len = label.len();
- if len > 0x34 {
+ if len > 0x3f {
  return Err("Single label exceeds 63 characters of length".into());
  }