Have org.apache.logging.log4j.util.Base64Util invoke java.util.Base64 directly instead of reflectively (#3686)

Author: Jan Luehe

src/changelog/.2.x.x/3687_invoke_java_util_base64_directly_instead_of_reflectively.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="3687" link="https://github.com/apache/logging-log4j2/issues/3687"/>
+  <description format="asciidoc">Simplify org.apache.logging.log4j.util.Base64Util by having it invoke java.util.Base64 directly instead of reflectively.</description>
+</entry>