Daemon used false logic for determining whether there were any clients.
When the timer was inactive, it was activated if at least one of the
servers did not have clients. So the bool was being flipped there and
back all the time in case there was one client, for example.
Initially introduced by fa14207368.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1240283
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
VIR_APPEND_ELEMENT would clear @srv to NULL after it successfully
inserted it thus the reference count could not be increased afterwards.
Switch to VIR_APPEND_ELEMENT_COPY. This fixes crash after terminating
the daemon.
