Another systemd-resolved problem in 17.04

[Chris Green]

After my problems with systemd-resolved being unable to resolve
unqualified names I've hit another issue that seems to be a resolver
problem as well.

I left my laptop running for a few days and this morning DNS was
broken, most queries were getting REFUSED returned by the local
resolver.  All other systems on the LAN (not yet 17.04) had DNS
functioning OK.

Restarting system-resolved seems to have fixed the problem (I did mean
to send it a SIGUSR2 but killed it by mistake).

-- 
Chris Green