Added a format_exception method.  This is essentially the method
used by the ZPublisher exception handler and has the nice feature
of showing object __names__ and __traceback_info__.  It is useful
in back-end log handlers *and* in other applications that want to
display tracebacks.

Added output of exception info to the stupid logger.

with orther developers without bumping into each others ports.

self.aq_parent.this(), instead of just self.aq_parent, so we're sure
to get beyond doggone W wrapper objects.

self.getRolesInContext() when object is specified, which does The
Right Thing.

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.