Bug#387432: lintian: init.d test should allow present but empty default-stop and required-stop

[Petter Reinholdtsen <pere@hungry.com>]

Package: lintian
Version: 1.23.24

Great to see lintian check for LSB headers in init.d scripts. :)

But while working on systems using these headres, I discovered an
issue.  When running lintian on the latest version of ifupdown, it
complains about the init.d scripts:

  W: ifupdown: init.d-script-missing-lsb-keyword
    /etc/init.d/ifupdown-clean default-stop
  W: ifupdown: init.d-script-missing-lsb-keyword
    /etc/init.d/ifupdown-clean required-stop

The script look like this, and it should not stop in any runlevel, and
only be used in runlevel S, and thus do not need any required-stop
values either:

### BEGIN INIT INFO
# Provides:          ifupdown-clean
# Required-Start:    checkroot
# Required-Stop:
# Default-Start:     S
# Default-Stop:
# Short-Description: Clean old iterface status info during boot.
### END INIT INFO

So the lintian check should accept present but empty required-stop and
default-stop headers.  It should probably also accept empty but
present required-start and default-start values, for scripts only used
during shutdown.

Friendly,
-- 
Petter Reinholdtsen