Add changelog entries from latest release (#12475)

CHANGELOG.md

@@ -1,3 +1,34 @@
+## 1.10.9 (February 28, 2022)
+
+SECURITY:
+
+* agent: Use SHA256 instead of MD5 to generate persistence file names.
+
+FEATURES:
+
+* ca: support using an external root CA with the vault CA provider [[GH-11910](https://github.com/hashicorp/consul/issues/11910)]
+
+IMPROVEMENTS:
+
+* connect: Update supported Envoy versions to include 1.18.6 [[GH-12450](https://github.com/hashicorp/consul/issues/12450)]
+* connect: update Envoy supported version of 1.20 to 1.20.2 [[GH-12434](https://github.com/hashicorp/consul/issues/12434)]
+* debug: reduce the capture time for trace to only a single interval instead of the full duration to make trace.out easier to open without running into OOM errors. [[GH-12359](https://github.com/hashicorp/consul/issues/12359)]
+* raft: add additional logging of snapshot restore progress [[GH-12325](https://github.com/hashicorp/consul/issues/12325)]
+* rpc: improve blocking queries for items that do not exist, by continuing to block until they exist (or the timeout). [[GH-12110](https://github.com/hashicorp/consul/issues/12110)]
+* sentinel: **(Enterprise Only)** Sentinel now uses SHA256 to generate policy ids
+* server: conditionally avoid writing a config entry to raft if it was already the same [[GH-12321](https://github.com/hashicorp/consul/issues/12321)]
+* server: suppress spurious blocking query returns where multiple config entries are involved [[GH-12362](https://github.com/hashicorp/consul/issues/12362)]
+
+BUG FIXES:
+
+* agent: Parse datacenter from Create/Delete requests for AuthMethods and BindingRules. [[GH-12370](https://github.com/hashicorp/consul/issues/12370)]
+* areas: **(Enterprise Only)** Fixes a bug when using Yamux pool ( for servers version 1.7.3 and later), the entire pool was locked while connecting to a remote location, which could potentially take a long time. [[GH-1368](https://github.com/hashicorp/consul/issues/1368)]
+* raft: fixed a race condition in leadership transfer that could result in reelection of the current leader [[GH-12325](https://github.com/hashicorp/consul/issues/12325)]
+* server: **(Enterprise only)** Namespace deletion will now attempt to delete as many namespaced config entries as possible instead of halting on the first deletion that failed.
+* server: partly fix config entry replication issue that prevents replication in some circumstances [[GH-12307](https://github.com/hashicorp/consul/issues/12307)]
+* ui: Ensure we always display the Policy default preview in the Namespace editing form [[GH-12316](https://github.com/hashicorp/consul/issues/12316)]
+* xds: Fixed Envoy http features such as outlier detection and retry policy not working correctly with transparent proxy. [[GH-12385](https://github.com/hashicorp/consul/issues/12385)]
+
 ## 1.10.8 (February 11, 2022)
 
 SECURITY: