Merge #15604: [docs] release note for disabling reject messages by default

92f3e80 [docs] release note for disabling reject messages by default (John Newbery)

Pull request description:

  v0.18 deprecated BIP 61 REJECT messages.

  v0.19 disables them by default (#14054). This adds a release note to document that.

  BIP 61 REJECT messages will be removed entirely in a future version.

Tree-SHA512: 575b7e2800c40cd47b8704abb3ab1e5acdd266ece7209a629e47fed1a88ca94bc0858591e8707b157e913385360a43f2695ecaae81e9881dc2a9b3c9391c80c2

Author: laanwj

doc/release-notes-14054.md

@@ -0,0 +1,7 @@
+P2P changes
+-----------
+
+BIP 61 reject messages were deprecated in v0.18. They are now disabled by
+default, but can be enabled by setting the `-enablebip61` command line option.
+BIP 61 reject messages will be removed entirely in a future version of
+Bitcoin Core.