support both dbs, although it will be nice when we won't have to.

instances and classes.

Changed to use new object management hooks.

Add an exception handler for initializing products so that a bad
product can't keep the site from coming up.

support both dbs, although it will be nice when we won't have to.

Changed some ZServer details, (you don't need to specify a DNS server, you just can't specify a bad one.)

exceeding underlying BTree data because BTree items were deleted
since the BTreeItems object was deleted.

Note that accessing BTreeItems elements could give incorrect
results if BTree items are deleted after creating a BTreeItems
object.

Added some documentation to ZService. Now ZService uses the registry to store ZServer information. Also event logging is a bit improved. We're getting closer.