Revision 2056

"Anonymize" IPs in Google Analytics tracker.

 - removes the last octet of IP addresses, according to docs
 - follows notice from user in Mageia forum
   https://forums.mageia.org/en/viewtopic.php?t=4367
 - will be deployed on other existing trackers on mageia.org
 - cf. https://wiki.mageia.org/en/Privacy_policy#Web_sites_analytics