[development] SoC: Multi-site administration through rich XUL client

[Eric Brunner-Williams]

> Multi-site user approval
> Multi-site comment approval, administration
> Multi-site spam configuration
> Multi-site disabling for security seems like low use but critical.
> 
> Other usecases?

partition from a single instance to multiple instances
merger from multiple instances to a single instance

a mechanism for scoping consistency of configuration state

these are all hierarchical pushs of state, i suppose a get,
for state change notice, aka syslog, could be useful.