added new --with-unitdir configure option
Initial network and network@.service file (bnc#821879)

Added network@.service to avoid that systemd-udev kills dhcp clients
which where forked out of the udev hotplug rule 77 and network.service
file to be able to set GuessMainPID=yes and RemainAfterExit=yes.
Enable the new network.service file at install
Redirect ifup/ifdown to network@ifname.service
version 0.81.1, updated changes file