Github user JaroslavTulach commented on the issue:
https://github.com/apache/incubator-netbeans/pull/2
This is an API change (one can register `Authenticator` which wasn't
possible). You should also change `apichanges.xml` and `arch.xml` files. The
later one to describe the API - use `<api group="lookup"....>` tag, the first
file to refer to description of the change. You should also increase the
version number of the module and use it in `apichanges.xml` file. Please run
`ant javadoc` and make sure your documentation looks acceptable.
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