DOC: update Proxy docs to match actual input

Author: tacaswell

src/bluesky/callbacks/zmq.py

@@ -134,14 +134,30 @@ class Proxy:
     """
     Start a 0MQ proxy on the local host.
 
+    The addresses can be specified flexibly.  It is best to use
+    a domain_socket (available on unix):
+
+     - ``'icp:///tmp/domain_socket'``
+     - ``('ipc', '/tmp/domain_socket')``
+
+    tcp sockets are also supported:
+
+     - ``'tcp://localhost:6557'``
+     - ``6657``  (implicitly binds to ``'tcp://localhost:6657'``
+     - ``('tcp', 'localhost', 6657)``
+     - ``('localhost', 6657)``
     Parameters
     ----------
-    in_port : int, optional
-        Port that RunEngines should broadcast to. If None, a random port is
-        used.
-    out_port : int, optional
-        Port that subscribers should subscribe to. If None, a random port is
-        used.
+    in_address : str or tuple or int, optional
+        Address that RunEngines should broadcast to.
+
+        If None, a random tcp port on all interfaces is used.
+
+    out_address : str or tuple or int, optional
+        Address that subscribers should subscribe to.
+
+        If None, a random tcp port on all interfaces is used.
+
     zmq : object, optional
         By default, the 'zmq' module is imported and used. Anything else
         mocking its interface is accepted.