Do not stop, but kill network daemons on uninstall

Do not stop the network interfaces, but kill the network and all
network@<ifname> services to kill all dhcp clients on uninstall.
Added otherproviders(/sbin/ifup) rpm conflict
version 0.81.2, updated changes file
Added a systemctl guard to rpm post script
Fixed dhcpcd-hook to reload syslog using systemctl

Fixed to reload syslog on hostname changes using systemctl as
there is no /etc/init.d/syslog script since syslog-service-2.0
(bnc#830467).