Bug#948376: lintian: no-dh-sequencer tag shouldn't be "certain"

[Fabian Wolff <fabi.wolff@arcor.de>]

Package: lintian
Severity: minor

The no-dh-sequencer tag should not be marked "certain", especially not
the way the check is implemented right now.

For instance, it breaks even for simple examples like this one:

%:
	if [ $(WITH_JAVA) = yes ]; then \
		dh $@ --with python3,javahelper,ocaml; \
	else \
		dh $@ --with python3,ocaml; \
	fi

Additionally, let's say I start a Turing machine and then run "dh $@";
then the no-dh-sequencer tag applies iff the Turing machine does not
halt. So the check is undecidable, another reason for why it shouldn't
be "certain" :-)

Best regards,
Fabian