The big news in this patch is that we can now connect to devices with
startDeviceReq, and also ZUM is able to make calls successfully into devices
using the management channel endpoint.

From next patch on we'll be working to set up the proper callee-side groundwork
for regions, and also to complete startDeviceReq.

* Silenced some excessively verbose messages from the heap which were triggered
  when a chink didn't have enough memory, and therefore other chunks had to be
  checked.
* Fixed up strerror()'s string table.
* Devices' regions now listen for events from MSGSTREAM_SUBSYSTEM_ZUDI. Probably
  in the next patch we'll write a proper handler and have them properly listen
  for MSGSTREAM_ZUDI_CHANNEL_SEND.
* Worked in proper support for setting the management child_bind_ops vector.
  The DriverInstance now sets this on execution. This means that
  FloodplainnStream::connect() now works correctly.
* Did some fleshing out of the udi_mgmt metalanguage library, but I don't think
  we'll end up using this.
* Got rid of the udi_mgmt meta specific data structures in DriverInstance. These
  corner case metadata members were relics of bad design past.
* All FloodplainnStream:: endpoint related methods now return fplainn::Endpoint,
  the base class and not the derived class, fplainn::FStreamEndpoint.

* We finally started up the ZUM Server thread!

* Implemented the udi_mgmt udi_layout_t layouts in ZUM server.
* Fixed build errors in ZUM server.
* Implemented the relay handlers for usageInd and channelEventInd in ZUM Server.