QueryLogger uses D2-app /logs dir, even if script called from elsewhere via .cgi script - was creating logfiles relative to calling script, so cgi-bin needed symlink to logs dir
setting $Local:DB::NO_LOG_QUERIES true was preventing sql trace output in QueryLogger::log_query so moved it to QueryLogger to take effect on dispatcher log() command; new Utils::datetime_to_string method + test file
replaced Log::Dispatch::File::Rolling with Log::Dispatch::File for deployment since LDF::Rolling creates redundant file and doesn't handle file permissions properly, and file rotation handled by cron anyway; added today() to Local::Utils
