Add changelog for StatusLogger changes in 2.23.0 (#3838)

Author: vy

src/changelog/2.23.0/.release-notes.adoc.ftl

@@ -20,8 +20,16 @@
 
 <#if release.date?has_content>Release date:: ${release.date}</#if>
 
-This release adds support for LMAX Disruptor 4.x and several performance and bug fixes.
+This release adds support for LMAX Disruptor 4.x, revamps `StatusLogger`, and incorporates several performance and bug fixes.
 
 In order to maintain compatibility with JRE 8, support for LMAX Disruptor 3.x is maintained.
 
+[#release-notes-2-23-0-StatusLogger]
+=== `StatusLogger` improvements
+
+`StatusLogger` is a standalone, self-sufficient `Logger` implementation to record events that occur in the logging system (i.e., Log4j) itself.
+It is the logging system used by Log4j for reporting status of its internals.
+This release improves `StatusLogger` to make it self-contained and testable.
+During this simplification, the message factory for `log4j-to-slf4j` and `log4j-to-jul` is fixed to `ParameterizedMessageFactory`.
+
 <#include "../.changelog.adoc.ftl">

src/changelog/2.23.0/revamp_StatusLogger.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<entry xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+       xmlns="https://logging.apache.org/xml/ns"
+       xsi:schemaLocation="https://logging.apache.org/xml/ns https://logging.apache.org/xml/ns/log4j-changelog-0.xsd"
+       type="changed">
+  <issue id="2249" link="https://github.com/apache/logging-log4j2/pull/2249"/>
+  <description format="asciidoc">Make `StatusLogger` self-contained and testable</description>
+</entry>