implement the RFC 2389 "FEAT" command

lib/python/ZServer/FTPServer.py

@@ -508,6 +508,13 @@ class zope_ftp_channel(ftp_channel):
     def cmd_appe(self, line):
         self.respond('502 Command not implemented.')
 
+    def cmd_feat(self, line):
+        # specified in RFC 2389; gives a list of supported extensions
+        self.respond('211-Extensions supported:\r\n'
+                     ' MDTM\r\n'
+                     ' SIZE\r\n'
+                     '211 END')
+
 
 
 # Override ftp server receive channel reponse mechanism