Title: #5450: kcm: add support for kerberos tgt renewals
It's not sleeping, it still spins in tevent loop doing stuff
which may have a negative impact on battery.
That's exactly my question: what is it doing? IIUC, it should be sleeping on `epoll()`
(say 99.999% of the time)
If it actually does something useful, it means process would have to be socket activated
otherwise which is much more expensive than awaking from epoll().
If it doesn't do anything usefull, then what is it doing?
See the full comment at https://github.com/SSSD/sssd/pull/5450#issuecomment-799394082