Merge pull request #6476 from zmstone/chore-introduce-CHANGE.md

chore: add CHANGE.md

CHANGES.md

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+# EMQ X 4.3 Changes
+
+Started tracking changes in CHANGE.md since EMQ X v4.3.11
+
+NOTE: Keep pre-pedning to the head of the file instead of the tail
+
+File format:
+
+- Use weight-2 heading for releases
+- One list item per change topic
+  Change log ends with a list of github PRs
+
+## v4.3.11
+
+Important notes:
+
+- For Debian/Ubuntu users
+
+  We changed package installed service from init.d to systemd.
+  The upgrade from init.d to systemd is verified, however it is
+  recommended to verify it before rolling out to production.
+  At least to ensure systemd is available in your system.
+
+- For Centos Users
+
+  RPM package now depends on `openssl11` which is NOT available
+  in certain centos distributions.
+  Please make sure the yum repo [epel-release](https://docs.fedoraproject.org/en-US/epel) is installed.
+
+### Important changes
+
+* Debian/Ubuntu package (deb) installed EMQ X now runs on systemd [#6389]<br>
+  This is to take advantage of systemd's supervision functionality to ensure
+  EMQ X service is restarted after crash.
+
+* Clustering malfunction fixes [#6221, #6225, #6381]
+
+### Minor changes
+
+* Improved log message when TCP proxy is in use but proxy_protocol configuration is not turned on [#6416]<br>
+  "please check proxy_protocol config for specific listeners and zones" to hint a misconfiguration
+
+* Helm chart supports networking.k8s.io/v1 [#6368]
+
+* Fix session takeover race condition which may lead to message loss [#6396]
+
+* EMQ X docker images are pushed to aws public ecr in an automated CI job [#6271]<br>
+  `docker pull public.ecr.aws/emqx/emqx:4.3.10`
+
+* Fix webhook URL path to allow rule-engine variable substitution [#6399]
+
+* Corrected RAM usage display [#6379]
+
+* Changed emqx_sn_registry table creation to runtime [#6357]<br>
+  This was a bug introduced in 4.3.3, in whihch the table is changed from ets to mnesia<br>
+  this will cause upgrade to fail when a later version node joins a 4.3.0-2 cluster<br>
+
+* Log level for normal termination changed from info to debug [#6358]
+
+* Added config `retainer.stop_publish_clear_msg` to enable/disable empty message retained message publish [#6343]<br>
+  In MQTT 3.1.1, it is unclear if a MQTT broker should publish the 'clear' (no payload) message<br>
+  to the subscribers, or just delete the retained message. So we have made it configurable
+
+* Fix mqtt bridge malfunction when remote host is unreachable (hangs the connection) [#6286, #6323]
+
+* System monotor now inspects `current_stacktrace` of suspicious process [#6290]<br>
+  `current_function` was not quite helpful
+
+* Changed default `max_topc_levels` config value to 128 [#6294, #6420]<br>
+  previously it has no limit (config value = 0), which can be a potential DoS threat
+
+* Collect only libcrypto and libtinfo so files for zip package [#6259]<br>
+  in 4.3.10 we tried to collect all so files, however glibc is not quite portable
+
+* Added openssl-1.1 to RPM dependency [#6239]
+
+* Http client duplicated header fix [#6195]
+
+* Fix `node_dump` issues when working with deb or rpm installation [#6209]
+
+* Pin Erlang/OTP 23.2.7.2-emqx-3 [#6246]<br>
+  4.3.10 is on 23.2.7.2-emqx-2, this bump is to fix an ECC signature name typo:
+  ecdsa_secp512r1_sha512 -> ecdsa_secp521r1_sha512
+
+* HTTP client performance improvement [#6474, #6414]<br>
+  The changes are mostly done in the dependency [repo](https://github.com/emqx/ehttpc).
+
+* For messages from gateways add message properties as MQTT message headers [#6142]<br>
+  e.g. messages from CoAP, LwM2M, Stomp, ExProto, when translated into MQTT message<br>
+  properties such as protocol name, protocol version, username (if any) peer-host<br>
+  etc. are filled as MQTT message headers.
+
+## v4.3.0~10
+
+Older version changes are not tracked here.