add more redirects (#3532)

docs/en/apm-server/redirects.asciidoc

@@ -665,6 +665,12 @@ Refer to {observability-guide}/configure-tail-based-sampling.html[Configure tail
 
 Refer to {observability-guide}/log-correlation.html[Logging integration].
 
+[discrete]
+[[ingest-logs-in-es]]
+==== Ingest your logs into Elasticsearch
+
+Refer to {observability-guide}/log-correlation.html#ingest-logs-in-es[Ingest your logs into Elasticsearch].
+
 [role="exclude",id="cross-cluster-search"]
 === Cross-cluster search
 
@@ -704,6 +710,18 @@ Refer to {observability-guide}/how-to-guides.html[How-to guides].
 === Create and upload source maps (RUM)
 Refer to {observability-guide}/source-map-how-to.html[Create and upload source maps (RUM)]
 
+[discrete]
+[[source-map-rum-generate]]
+==== Generate a source map
+
+Refer to {observability-guide}/source-map-how-to.html#source-map-rum-generate[Generate a source map]
+
+[discrete]
+[[source-map-rum-upload]]
+==== Upload the source map
+
+Refer to {observability-guide}/source-map-how-to.html#source-map-rum-upload[Upload the source map]
+
 [role="exclude",id="jaeger-integration"]
 === Integrate with Jaeger
 
@@ -836,6 +854,12 @@ Refer to {observability-guide}/configuring-howto-apm-server.html[Configure].
 
 Refer to {observability-guide}/configuration-process.html[General configuration options].
 
+[discrete]
+[[max_event_size]]
+==== Max event size
+
+Refer to {observability-guide}/configuration-process.html#max_event_size[Max event size].
+
 [role="exclude",id="configuration-anonymous"]
 === Anonymous authentication
 
@@ -941,6 +965,18 @@ Refer to {observability-guide}/configuration-path.html[Project paths].
 
 Refer to {observability-guide}/configuration-rum.html[Real User Monitoring (RUM)].
 
+[discrete]
+[[rum-library-pattern]]
+==== Library Frame Pattern
+
+Refer to {observability-guide}/configuration-rum.html#rum-library-pattern[Library Frame Pattern].
+
+[discrete]
+[[rum-allow-origins]]
+==== Allowed Origins
+
+Refer to {observability-guide}/configuration-rum.html#rum-allow-origins[Allowed Origins].
+
 [role="exclude",id="configuration-ssl-landing"]
 === SSL/TLS settings
 
@@ -1046,6 +1082,12 @@ Refer to {observability-guide}/secure-agent-communication.html[With APM agents].
 
 Refer to {observability-guide}/agent-tls.html[APM agent TLS communication].
 
+[discrete]
+[[agent-client-cert]]
+==== Client certificate authentication
+
+Refer to {observability-guide}/agent-tls.html#agent-client-cert[Client certificate authentication].
+
 [role="exclude",id="api-key"]
 === API keys
 
@@ -1193,6 +1235,12 @@ Refer to {observability-guide}/api-events.html[Elastic APM events intake API].
 
 Refer to {observability-guide}/api-metadata.html[Metadata].
 
+[discrete]
+[[api-metadata-schema]]
+==== Metadata scheme
+
+Refer to {observability-guide}/api-metadata.html#api-metadata-schema[Metadata scheme].
+
 [role="exclude",id="api-transaction"]
 === Transactions