Collector #1992: unified visible hostname/ip address during the startup

phase for FTP and HTTP servers

lib/python/ZServer/medusa/ftp_server.py

@@ -706,10 +706,10 @@ class ftp_server (asyncore.dispatcher):
         self.port = port
         self.authorizer = authorizer
 
-        if hostname is None:
-            self.hostname = socket.gethostname()
-        else:
-            self.hostname = hostname
+        try:
+            self.hostname = socket.gethostbyaddr(ip)[0]
+        except socket.error:
+            self.hostname = ip
 
         # statistics
         self.total_sessions = counter()