[2710] small cleanup: make _accounts_file member 'private'

src/bin/cmdctl/cmdctl.py.in

@@ -502,7 +502,7 @@ class SecureHTTPServer(socketserver_mixin.NoPollMixIn,
         self._verbose = verbose
         self._lock = threading.Lock()
         self._user_infos = {}
-        self._accounts_file = None
+        self.__accounts_file = None
         self.__accounts_file_mtime = 0
 
     def _create_user_info(self, accounts_file):
@@ -512,14 +512,14 @@ class SecureHTTPServer(socketserver_mixin.NoPollMixIn,
         # If the file does not exist, set accounts to empty, and return
         if not os.path.exists(accounts_file):
             self._user_infos = {}
-            self._accounts_file = accounts_file
+            self.__accounts_file = accounts_file
             self.__accounts_file_mtime = 0
             return
 
         # If the filename hasn't changed, and the file itself
         # has neither, do nothing
         accounts_file_mtime = os.stat(accounts_file).st_mtime
-        if self._accounts_file == accounts_file and\
+        if self.__accounts_file == accounts_file and\
            accounts_file_mtime <= self.__accounts_file_mtime:
             return
 
@@ -538,7 +538,7 @@ class SecureHTTPServer(socketserver_mixin.NoPollMixIn,
                 if csvfile:
                     csvfile.close()
 
-        self._accounts_file = accounts_file
+        self.__accounts_file = accounts_file
         self.__accounts_file_mtime = accounts_file_mtime
         if len(self._user_infos) == 0:
             logger.error(CMDCTL_NO_USER_ENTRIES_READ)