Added changelog entry

docs/changelogs/v0.18.md

@@ -68,6 +68,19 @@ $ curl "http://127.0.0.1:8080/ipfs/$DIR_CID?format=dag-json" | jq
 }
 ```
 
+#### Improving libp2p resource management integration
+
+To help protect nodes from DoS (resource exhaustion) and eclipse attacks,
+Kubo enabled the [go-libp2p Network Resource Manager](https://github.com/libp2p/go-libp2p/tree/master/p2p/host/resource-manager)
+by default in [Kubo 0.17](https://github.com/ipfs/kubo/blob/master/docs/changelogs/v0.17.md#libp2p-resource-management-enabled-by-default).
+ Introducing limits like this by default after the fact is tricky,
+ and various improvements have been made to improve the UX including:
+ 1. [Dedicated docs concerning the resource manager integration](https://github.com/ipfs/kubo/blob/master/docs/libp2p-resource-management.md).  This is a great place to go to learn more or get your FAQs answered.
+ 2. Increasing the default limits for the resource manager.
+ 3. Enabling the [`Swarm.ConnMgr`](https://github.com/ipfs/kubo/blob/master/docs/config.md#swarmconnmgr) by default and reducing it thresholds so it can intelligently prune connections in many cases before the indiscriminate resource manager kicks in.
+ 4. Adjusted log messages and levels to make clear that the resource manager is likely doing your node a favor by bounding resources.
+ 5. [Other miscellaneous config and command bugs reported by users](https://github.com/ipfs/kubo/issues/9442).
+
 ### Changelog
 
 ### Contributors