Flag values for use with entry listeners.
The flags are a bitmask and must be OR'ed together to indicate the
combination of events desired to be received.
The constants kNew, kDelete, kUpdate, and kFlags represent different events
that can occur to entries.
By default, notifications are only generated for remote changes occurring
after the listener is created. The constants kImmediate and kLocal are
modifiers that cause notifications to be generated at other times.
Set this flag to receive notification of both local changes and changes
coming from remote nodes. By default, notifications are only generated
for remote changes. Must be combined with some combination of kNew,
kDelete, kUpdate, and kFlags to receive notifications of those respective