10.1.1. Features of Apache HTTP Server 2.0
Apache HTTP Server 2.0 includes the following features:
Apache API — Modules utilize a more powerful set of Application Programming Interfaces (APIs).
Modules built for Apache HTTP Server 1.3 do not work without being ported to the new API. If unsure whether or not a particular module has been ported, consult the developer before upgrading.
Filtering — Modules can act as content filters. Refer to Section 10.2.4, “Modules and Apache HTTP Server 2.0” for more on how filtering works.
IPv6 Support — The next generation IP addressing format is supported.
Simplified Directives — A number of confusing directives have been removed while others have been simplified. Refer to Section 10.5, “Configuration Directives in httpd.conf” for more information about specific directives.
Multilingual Error Responses — When using Server Side Include (SSI) documents, customizable error response pages can be delivered in multiple languages.
A more complete list of changes can be found online at http://httpd.apache.org/docs-2.0/.