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+# $OpenLDAP$
+# Copyright 2007-2022 The OpenLDAP Foundation, All Rights Reserved.
+# COPYING RESTRICTIONS APPLY, see COPYRIGHT.
+
+H1: Changes Since Previous Release
+
+The following sections attempt to summarize the new features and changes in OpenLDAP
+software since the 2.4.x release and the OpenLDAP Admin Guide.
+
+H2: New Guide Sections
+
+In order to make the Admin Guide more thorough and cover the majority of questions
+asked on the OpenLDAP mailing lists and scenarios discussed there, we have added the following new sections:
+
+* {{SECT:When should I use LDAP?}}
+* {{SECT:When should I not use LDAP?}}
+* {{SECT:LDAP vs RDBMS}}
+* {{SECT:Access Control}}
+* {{SECT:Backends}}
+* {{SECT:Overlays}}
+* {{SECT:Replication}}
+* {{SECT:Maintenance}}
+* {{SECT:Monitoring}}
+* {{SECT:Tuning}}
+* {{SECT:Troubleshooting}}
+* {{SECT:Changes Since Previous Release}}
+* {{SECT:Upgrading from 2.4.x}}
+* {{SECT:Common errors encountered when using OpenLDAP Software}}
+* {{SECT:Recommended OpenLDAP Software Dependency Versions}}
+* {{SECT:Real World OpenLDAP Deployments and Examples}}
+* {{SECT:OpenLDAP Software Contributions}}
+* {{SECT:Configuration File Examples}}
+* {{SECT:LDAP Result Codes}}
+* {{SECT:Glossary}}
+
+Also, the table of contents is now 3 levels deep to ease navigation.
+
+
+H2: New Features and Enhancements in 2.5
+
+H3: Better {{B:cn=config}} functionality
+
+H3: Better {{B:cn=schema}} functionality
+
+H3: More sophisticated Syncrepl configurations
+
+H3: Replicating {{slapd}} Configuration (syncrepl and {{B:cn=config}})
+
+H3: More extensive TLS configuration control
+
+H3: Performance enhancements
+
+H3: New overlays
+
+H3: New features in existing Overlays
+
+H3: New features in slapd
+
+H3: New features in libldap
+
+H3: New clients, tools and tool enhancements
+
+H3: New build options
+
+H2: Obsolete Features Removed From 2.5
+
+These features were strongly deprecated in 2.4 and removed in 2.5.
+
+H3: back-bdb and back-hdb
+
+back-bdb and back-hdb were significantly slower than back-mdb and
+required significant tuning of multiple parameters to maximize
+performance. back-mdb requires no tuning and provides all the
+functionality previously provided via back-bdb and back-hdb.