message: doc: release notes for -enablebip61 default change
diff: @@ -59,6 +59,16 @@ support versions of macOS older than 10.10.
  Notable changes
  ===============
  +Command line option changes
  +---------------------------
  +
  +The `-enablebip61` command line option (introduced in Bitcoin Core 0.17.0) is
  +used to toggle sending of BIP 61 reject messages. Reject messages have no use
  +case on the P2P network and are only logged for debugging by most network
  +nodes. The option will now by default be off for improved privacy and security
  +as well as reduced upload usage. The option can explicitly be turned on for
  +local-network debugging purposes.
  +
  Example item
  ------------
  