Multiple copies of files in the source... why?

It was just pointed out to me that ext/rpc might be a good way to implement some java fixes for PHP. So upon taking a look, I discovered that ext/rpc/java exists, and it is (was) an exact copy of the ext/java directory tree. Why is this? And why isn't it be kept in sync with ext/java?

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Dan Kalowsky                    "Tonight I think I'll walk alone,

http://www.deadmime.org/~dank    I'll find myself as I go home"
dank-nom@aps-deadmime.org        - "Temptation",
kalowsky@php.net                          New Order