Support customization of default excludes

Our company uses a home-grown version control system that has it's own per-directory admin subdirectory, similar in purpose to the administration subdirectories used by other version control systems, eg. CVS, .svn, etc.

These directories are excluded from processing by default in Maven2, and we would like to add our custom admin subdirectory to the default exclusion list.

Recommended solution from Maven Users Mailing List:

Brett Porter wrote:

1. What you really need is to be able to configure it in a root POM shared by all projects, I think.

Hopefully, any such entry in pom.xml would not completely replace the default excludes list, but merely entend the built-in definition.