Log Message:
Update zope210 package to 2.10.6.

Zope 2.10.6 (2008/05/10)

Bugs fixed

Launchpad #142350: Display description for properties as row title, if present.
Launchpad #200007: DateTime(anotherDateTime) now preserves the timezone.
Launchpad #213311: Handle "unsubscriptable object" errors during \ 
publishing traversal.
Launchpad #143813: zopectl now exits non-zero when child processes fail.
Launchpad #173658: Removed dead code in OFS.Traversable's unrestrictedTraverse \ 
(apparent NameError).
Launchpad #198274: "empty" ZopePageTemplates could not be unpickled.
zope.security: switched to use standalone 3.3.3 version, which contains a \ 
backport of a huge performance bugfix from the 3.4 branch.
Launchpad #164783: Indexes were migrated on initial creation of a ZODB.