pi@raspberrypi ~ $ sudo update-rc.d znc defaults
update-rc.d: using dependency based boot sequencing
insserv: Script znc is broken: incomplete LSB comment.
insserv: missing `Required-Start:' entry: please add even if empty.
insserv: missing `Required-Stop:'  entry: please add even if empty.
insserv: missing `Default-Start:'  entry: please add even if empty.
insserv: missing `Default-Stop:'   entry: please add even if empty.
insserv: script znc provides system facility $remote_fs, skipped!
insserv: script znc provides system facility $syslog, skipped!
insserv: Default-Start undefined, assuming empty start runlevel(s) for script `znc'
insserv: Default-Stop  undefined, assuming empty stop  runlevel(s) for script `znc'
pi@raspberrypi ~ $