[Zope3-dev] Enable activity monitor for Zope 3

[Jim Fulton]

I'd like to enable ZODB activity monitoring for Zope 3 in much the
same way it is enabled for Zope 2.  I've found the data this provides
to be very useful for configuring the ZODB cache and otherwise see 
what's going on in a system, especially when there are performance
issues.  I'm not going create a UI for it, but having it enabled will
facilitate  providing UIs in add-on packages.

I'm going to go ahead and enable this before the feature freeze
for 3.4.  If anyone objects, please let me know.

Jim