Add new file 100-monitor_kernel_version.inc.php to stable-3.1 in relation to recently merged commits of ispconfig/ispconfig3!790 and ispconfig/ispconfig3!791.

There is a fix to the filename for master submitted via commit ispconfig/ispconfig3!804 that is still pending.

Missed .inc in filename 100-monitor-kernel-version.php

Add new file to display current kernel info. Related to comment ispconfig/ispconfig3!789 (comment 63987)

Make traffic quota datas available for template

every cron execution. The logfile can be disabled by using -NoLog

We do only trigger a rewrite of the zonefile by touching server log so no need to chank against existance of a file.
Thanks to Tom Albers who pointed me to this issue by providing an excellent bug report!

Also removed some garbage

instead we are now using dynamic purging of the logs.