doc: add release notes for 26896

fanquake · fanquake · commit d51f0fa4b7b1 · 2023-01-28T15:27:27.000Z
diff --git a/doc/release-notes-26896.md b/doc/release-notes-26896.md
@@ -0,0 +1,7 @@
+Build System
+------------
+
+The --enable-upnp-default and --enable-natpmp-default options
+have been removed. If you want to use port mapping, you can
+configure it using a .conf file, or by passing the relevant
+options at runtime.
