lintian: Override some checks

lintian: Override some checks

The mannpage message on line 51 is
  warning: file `<standard input>', around line 51:
    table wider than line width
and refers to this line
  dgit-maint-gbp(7)	for maintainers already using git-buildpackage
which does in fact fit (just) in an 80-column xterm.

I hope dgit-badcommit-fixup is never going to be needed enough again
to need a manpage.

I don't agree that trailing whitespace in changelog is a problem.

Remaining messages from

  lintian -EI --pedantic --no-tag-display-limit --suppress-tags=syntax-error-in-debian-changelog,changelog-empty-entry ../bpd/dgit_9.9~_multi.changes

are as follows:

  W: dgit source: missing-debian-source-format
  I: dgit source: older-source-format 1.0

I don't agree that source format 1.0 is wrong.  There are difficulties
with 3.0 native (for example, that it forbids non-native versions) so
1.0 must continue to be used so that it continues to exist.

I also don't agree that missing source format is a problem.  The
semantics are well defined.

  P: dgit source: package-uses-old-debhelper-compat-version 9
  W: dgit source: unnecessary-testsuite-autopkgtest-field

I like to keep things backwards compatible for a much longer time than
most people.  jessie is currently oldoldstable and has dh 9.

  P: dgit source: no-dep5-copyright

I don't have effort for this.  I think it is largely busywork but I
would accept a patch.

  I: dgit: package-contains-empty-directory usr/share/man/man5/

Avoiding this is awkward.

  W: dgit-infrastructure: binary-without-manpage usr/bin/dgit-mirror-rsync
  W: dgit-infrastructure: binary-without-manpage usr/bin/dgit-repos-admin-debian
  W: dgit-infrastructure: binary-without-manpage usr/bin/dgit-repos-policy-debian
  W: dgit-infrastructure: binary-without-manpage usr/bin/dgit-repos-policy-trusting
  W: dgit-infrastructure: binary-without-manpage usr/bin/dgit-repos-server
  W: dgit-infrastructure: binary-without-manpage usr/bin/dgit-ssh-dispatch

In principle manpages for some of all of these would be good.  But the
usefuless of these programs is largely limited to people whose
requirements are extremely similar to Debian's.  Most people can just
use a normal git server.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>