Collector 1542: Python 2.4/Zope 2.8 unittest failure in asyncore.py

Forward port form 2.7 branch.

medusa's class monitor_server derives from asyncore.dispatcher, but
never called the latter's constructor.  As a result, the ._map attribute
set by 2.4's asyncore.dispatcher.__init__() never gets set, and calling
asyncore methods later dies with an AttributeError on ._map.  The fix
is a 1-liner, adding a call to the base-class constructor.

lib/python/ZServer/medusa/monitor.py

@@ -163,6 +163,7 @@ class monitor_server (asyncore.dispatcher):
     channel_class = monitor_channel
     
     def __init__ (self, hostname='127.0.0.1', port=8023):
+        asyncore.dispatcher.__init__(self)
         self.hostname = hostname
         self.port = port
         self.create_socket (socket.AF_INET, socket.SOCK_STREAM)