Problem: --with-systemd is ambigous
Problem: --with-systemd is ambigous

Solution: given it referes to adding systemd unit files to
packaging, rename to --with-systemd-units to avoid confusion with
dependency on libsystemd

hintjens/zproject,taotetek/zproject,eburkitt/zproject,paddor/zproject,hintjens/zproject,taotetek/zproject,paddor/zproject,zeromq/zproject,zeromq/zproject,keent/zproject,eburkitt/zproject,zeromq/zproject,paddor/zproject,keent/zproject,twhittock/zproject,taotetek/zproject,twhittock/zproject