Respond immediately with no data in case of no cached information and register
cache filling.

In case if data are available, but older then 5 minutes, request its
recalculation.

10 was used for socket.AF_INET6, but it is 30. So don't hardcode values.

10 was used for socket.AF_INET6, but it is 30. So don't hardcode values.

Of course, this is bad...

All tests playing with users will fail because of test structure. It needs to be refactored.

While it is not mandatory and maybe can be avoided, current implementation of slaplib use computer_id heavily.