Don't suppress MacOS-specific errors.

src/zdaemon/tests/testzdrun.py

@@ -281,6 +281,11 @@ def send_action(action, sockname):
         sock.close()
         return response
     except socket.error, msg:
+        if msg[1] == 'AF_UNIX path too long':
+            # MacOS has apparent small limits on the length of a UNIX
+            # domain socket filename, we want to make MacOS users aware
+            # of the actual problem
+            raise
         return None
 
 def test_suite():