Merge branch 'bullseye' into buster

.gitignore

RELEASE-NOTES.md

debian/changelog

log4j-1.2-api/pom.xml

.../main/java/org/apache/log4j/builders/AbstractBuilder.java

...rc/main/java/org/apache/log4j/builders/BooleanHolder.java

...2-api/src/main/java/org/apache/log4j/builders/Holder.java

.../apache/log4j/builders/appender/AsyncAppenderBuilder.java

...pache/log4j/builders/appender/ConsoleAppenderBuilder.java

...4j/builders/appender/DailyRollingFileAppenderBuilder.java

...g/apache/log4j/builders/appender/FileAppenderBuilder.java

...pache/log4j/builders/appender/RewriteAppenderBuilder.java

...e/log4j/builders/appender/RollingFileAppenderBuilder.java

...apache/log4j/builders/appender/SyslogAppenderBuilder.java

...apache/log4j/builders/filter/LevelMatchFilterBuilder.java

...apache/log4j/builders/filter/LevelRangeFilterBuilder.java

...pache/log4j/builders/filter/StringMatchFilterBuilder.java

...a/org/apache/log4j/builders/layout/HtmlLayoutBuilder.java

...a/org/apache/log4j/builders/layout/TTCCLayoutBuilder.java

...va/org/apache/log4j/builders/layout/XmlLayoutBuilder.java