Remove localDnsResolver option
The mailserver.localDnsResolver
option was just a wrapper for
services.kresd.enable
. We don't require any specific resolver, so just
suggest kresd in the setup guide instead, this doesn't need to stay an
implementation detail we keep.
I also added a warning, when resolved is enabled, since it takes over resolvconf and prevents use of a full-blown resolver.
Edited by Martin Weinelt