Keep LU for the Client Identifier

An LU name can be kept (or reserved) for a period of time so no other client is assigned that name. Only the same Client Identifier reconnecting to Telnet within the specified time can be assigned that LU name. After the specified time, the LU name is again available for any connection. This function is useful when the application does not clean up session information quickly and a released LU is quickly reassigned to another user by Telnet. The application thinks the new session is a continuation of the previous session but it is not. With KEEPLU, the LU will not be reassigned to a different Client Identifier for a period of time, long enough for the application to clean up its session information. The LU name is kept based on the highest Client Identifier by which the connection is known. It is either a User ID derived from a client certificate, a Hostname, or an IP address, respectively.