[Distutils] [buildout] develop vs extends/default.cfg

[Chris Withers]

Hi All,

What is the expected behaviour when the following are all true:

- default.cfg has a develop key
- buildout.cfg has a develop key, and extends a base.bfg
- base.cfg has a develop key

My hope is that all 3 should be set unioned for the develop options.

However, my experience so far is that, at the least, the one in 
default.cfg is ignored...

Chris