[SAC] Please help adding "Services" category on the wiki

[Sandro Santilli]

I've added a new "Service" category tag in some of the SAC managed
OSGeo services page: https://wiki.osgeo.org/wiki/Category:Services

Hopefully this would help organize the system-administration related
information up there. My idea would be to have:

 - A page for each host (possibly a VM) [[Category:Infrastructure]]
   - Lists all VM and services hosted therein

 - A page for each service [[Category:Services]]
   - References the host hosting the service

Or something along those lines.
If you see see any service missing from the Category:Services page
please find the appropriate wiki page and add a [[Category::Services]]
label at the bottom. Thank you !

--strk;