* All channel spawning functions now take a "metaName" string argument which
  is used to label the channel that they spawn.
  ^ Zudi::spawnEndpoint.
  ^ Zudi::spawnInternalBindChannel.
  ^ Zudi::spawnChildBindChannel.
  ^ FloodplainnStream::connect.
* fplainn::Channel now takes a "metaName" string argument which is used to label
  new channel objects.

The purpose of these changes is to enable region threads to know what
metalanguage is associated with a particular channel when they are trying to
allocate their endpoint contexts.

The next step in furthering this aim will be a series of lookup methods
for internalBop and childBop metadata, probably.