||Returns the session id out of the IP address and the system time
||string with 16 chars,
1-8 : IP-number of the client as a HEX number
9-16: Seconds since 1970-1-1 as a HEX number
A session id of CGIGETSESSION is sufficient in practise. The case that two clients call a function via the same IP address at the same time is improbable.
To be absolute sure the session id returned by CGIGETSESSION can be expanded, eg. by a randomed number (as a STRING) that is incremented at every call.