The previous code was cutting (-f 2-3) the language field off, before
grepping for the language, so the grep never found anything, and the
level was never 3 or 4.

Remove unnecessary constraints

See merge request installer-team/localechooser!5

* Build-Depends: Drop versioned constraint on dpkg-dev and intltool-debian.
* localechooser: Drop versioned constraint on cdebconf-udeb in Depends.

Changes-By: deb-scrub-obsolete

Fix some issues reported by lintian

See merge request installer-team/localechooser!4

Changes-By: lintian-brush
Fixes: lintian: uses-debhelper-compat-file
See-also: https://lintian.debian.org/tags/uses-debhelper-compat-file.html

Changes-By: lintian-brush
Fixes: lintian: package-uses-deprecated-debhelper-compat-version
See-also: https://lintian.debian.org/tags/package-uses-deprecated-debhelper-compat-version.html

Changes-By: lintian-brush
Fixes: lintian: maintainer-script-without-set-e
See-also: https://lintian.debian.org/tags/maintainer-script-without-set-e.html

Changes-By: lintian-brush
Fixes: lintian: debhelper-but-no-misc-depends
See-also: https://lintian.debian.org/tags/debhelper-but-no-misc-depends.html

Correct Kabyle locale definition in languagelist (albeit of being a UTF-8 locale, the Kabyle locale is named 'kab_DZ')