Comment # 2 on bug 908023 from Bernhard Wiedemann

IMHO, this is a bug in the sysVinit-compat layer of systemd
around the wrapping of classic init scripts

# /etc/init.d/hylafax status >/dev/null; echo $?  
0
^ this is wrong, while the other variants are correct:

# SYSTEMD_NO_WRAP=1 /etc/init.d/hylafax status >/dev/null; echo $?
1
# service hylafax status >/dev/null ; echo $?
3