Try running daemons on UDS tpt

The root daemon, pikerd, needs to be adjusted to use diff default
registry addrs to also utilize non-TCP, but for now this gets us started
testing; so far so good B)

piker/cli/__init__.py

@@ -184,6 +184,7 @@ def pikerd(
                     registry_addrs=regaddrs,
                     loglevel=loglevel,
                     debug_mode=pdb,
+                    enable_transports=['uds'],
 
                 ) as service_mngr,  # normally delivers a ``Services`` handle