Fix whois UTF-8 encoding bug

Fix whois UTF-8 encoded output display bug. There was an exception triggered by any UTF-8 string in whois output, which theoretically should not happen but it happened quite offten that such a weird string appeared.
Silence excessive debug messages from BIRD parser

Silence excessive debug messages going to logfile from BIRD show protocols
parser when it struck newline with table name.
Add logfile size control to the ulg-cron

Logfile may grow to huge sizes when ULG runs with debug on.
To avoid situation there is a check of the size and eventual removal of
the overgrown logfile.
Fix empty result exception in decorate dispatch

Fix possible exception in siuation when empty result is passed to
decorateResult() methon of ulgmodel.
Add loging of request source IPs to ulg main()

Log requests, source IPs, actions and parameters of all CGI calls.