I just committed a change to Kernel to the Inbox which simply moves
messages in the 'tracing' category from Object to ProtoObject.  I know
we want to keep ProtoObject to an absolute minimum, but I also think
it is useful to be able to trace connectivity to proxies.  I would
also like to move Object>>#isLiteral up to ProtoObject to support
tracing, but refrained for now until I can gauge whether there is
support or opposition to this idea.  Thanks.

 - Chris