* Add a docstring to the class which:

  o References the interfaces wiki where the design is spelt out;

  o Provides a usage sample.

new GC strategy.

Meaningless checkpoint of other files.

changeOwnership method of Owned mixin failed when in "non-recursive" mode when trying to set child._owner = child._owner.  Why it was doing this I have no idea.  I changed it to set child._owner = new.  The trunk version of this method is significantly different than the 2.2.X branch version in other ways, so I can't make an analogous change to the 2.2.X branch.

Method attributes can now only be set by setting special attributes in
classes.

store the 'connection string' as a record object.

ZClasses typically defer creating them until product
registration;  the derived ZClass needs them to be available
immediately after import.  Deprecated
'ProductContext.registerZClass' and
'ProductContext.registerBaseClass' in favor of a new function,
'ZClasses.createZClassForBase' (because none of the machinery
needed a ProductContext instance anyway).

Removing expand tree tag argument which no one seems to know anything about and which I cannot get to work in a reasonable way.

Removed __replaceable__ from API docs. This is an *Implemtor* API, not a user's API. Only methods and attributes usable from DTML and Python Methods (restricted) should go in these API docs.

    EOF in value in RCS file /cvs-repository/Zope2/Extensions/README.txt,v

Not sure this'll work, and anyway if the corruption shows up again,
we'll have to investigate...

Changed Ownership tab. Got rid of implicit/explicit ownership. Now you just choose to take ownership of subobjects (or not) when taking ownership.