Upgrade guide note

diff --git a/pdns/recursordist/docs/upgrade.rst b/pdns/recursordist/docs/upgrade.rst
index 5de269031e83948b93b7a773ac66c057273b6a91..baf30bae38bec58964d892ac01bf6fe87a105360 100644 (file)
--- a/pdns/recursordist/docs/upgrade.rst
+++ b/pdns/recursordist/docs/upgrade.rst
@@ -57,6 +57,10 @@ Removed settings
 ^^^^^^^^^^^^^^^^
 - The :ref:`setting-query-local-address6` has been removed. It already was deprecated.
 
+New settings
+^^^^^^^^^^^^
+- A new setting :ref:`setting-tcp-fast-open-connect` has been introduced, it enables TCP Fast Connect for outgoing connections. Please read :ref:`tcp-fast-open-support` before enabling this feature.
+
 4.3.x to 4.4.0
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