Fix broken internal links

Author: ppkarwasz

src/site/antora/modules/ROOT/pages/manual/appenders/delegating.adoc

@@ -520,7 +520,7 @@ It allows adding or updating the keys of the `MapMessage`.
 
 | [[MapRewritePolicy-attr-mode]]mode
 | link:../../javadoc/log4j-core/org/apache/logging/log4j/core/appender/rewrite/MapRewritePolicy.Mode.html[`MapRewritePolicy.Mode`]
-| link:../https://logging.apache.org/log4j/2.x/javadoc/log4j-core/org/apache/logging/log4j/core/appender/rewrite/MapRewritePolicy.Mode.html#Add[`Add`]
+| link:../../javadoc/log4j-core/org/apache/logging/log4j/core/appender/rewrite/MapRewritePolicy.Mode.html#Add[`Add`]
 a|
 It determines which map entries to modify:
 

src/site/antora/modules/ROOT/pages/manual/appenders/message-queue.adoc

@@ -357,9 +357,8 @@ xref:plugin-reference.adoc#org-apache-logging-log4j_log4j-flume-ng_org-apache-lo
 === Flume event factories
 
 Flume event factories are Log4j plugins that implement the
-link:../../javadoc/log4j-flume-ng/org/apache/logging/log4j/flume/appender/FlumeEventFactory.html[`FlumeEventFactory`]
-and allow to customize the way log events are transformed into
-link:../../javadoc/log4j-flume-ng/org/apache/logging/log4j/flume/appender/FlumeEvent.html[`FlumeEvent`]s.
+`org.apache.logging.log4j.flume.appender.FlumeEventFactory`
+and allow to customize the way log events are transformed into `org.apache.logging.log4j.flume.appender.FlumeEvent`s.
 
 xref:plugin-reference.adoc#org-apache-logging-log4j_log4j-flume-ng_org-apache-logging-log4j-flume-appender-FlumeEventFactory[{plugin-reference-marker} Plugin reference for `FlumeEventFactory`]