- use-clamp-from-C-STD-library.patch: removed, upstreamed

- Refresh patches for new version
* update-alternatives-suse.patch
- Set minimum version for po4a to 0.59 in BuildRequires
- Update file list in %files section
- Version update to 1.20.9 (boo#1181867)
[ Guillem Jover ]
* Test suite:
- Pass --ignore-builtin-builddeps to dpkg-buildpackage.
- from version 1.20.8
[ Guillem Jover ]
* start-stop-daemon: Open the --output file in append mode.
* dpkg: Fix --auto-deconfigure for essential and protected during
installation. Reported by Julian Andres Klode .
See #983014.
* dpkg-realpath: Fix resolution for absolute symlinks on «/».
Closes: #983855
* dpkg-realpath: Fix symlink loop tracker.
* Perl modules:
- Test::Dpkg: Fix test data path fetching on CPAN.
- Dpkg::Exit: Preserve exit code in END block.
* Build system:
- Group Test::Dpkg changelog entries into “Perl modules” section.
* Packaging:
- Run autopkgtest test suites in verbose mode.
* Test suite:
- Set PERL in the perl test suite.
- Use gunzip instead of zcat and assume it might not be present.
- Mock dpkg and gcc for architecture detection code.