Support paging on master group lists.

Supports paging stuff on http://www.hyves.nl/hyves/
http://www.hyves.nl/club/ etc. Config the tracker to accept "," (comma)
as valid item name. Item names are defined as "CATEGORY,START,END". Eg:
"hyves,1000,1010" would fetch pages 1000 to 1010 on
http://www.hyves.nl/hyves/.