Fix to make -m/--monitor option work.

Bug fix from Jon Dyte.

src/ZEO/runzeo.py

@@ -87,8 +87,8 @@ class ZEOOptionsMixin:
                  default=100)
         self.add("transaction_timeout", "zeo.transaction_timeout",
                  "t:", "timeout=", float)
-        self.add("monitor_address", "zeo.monitor_address", "m:", "monitor=",
-                 self.handle_monitor_address)
+        self.add("monitor_address", "zeo.monitor_address.address",
+                 "m:", "monitor=", self.handle_monitor_address)
         self.add('auth_protocol', 'zeo.authentication_protocol',
                  None, 'auth-protocol=', default=None)
         self.add('auth_database', 'zeo.authentication_database',