Fix some issues reported by lintian

See merge request !1

Fixes: lintian: binary-control-field-duplicates-source
See-also: https://lintian.debian.org/tags/binary-control-field-duplicates-source.html

Fixes: lintian: debian-rules-uses-unnecessary-dh-argument
See-also: https://lintian.debian.org/tags/debian-rules-uses-unnecessary-dh-argument.html

Fixes: lintian: useless-autoreconf-build-depends
See-also: https://lintian.debian.org/tags/useless-autoreconf-build-depends.html

Fixes: lintian: debian-watch-file-is-missing
See-also: https://lintian.debian.org/tags/debian-watch-file-is-missing.html

Fixes: lintian: upstream-metadata-file-is-missing
See-also: https://lintian.debian.org/tags/upstream-metadata-file-is-missing.html


Fixes: lintian: upstream-metadata-missing-bug-tracking
See-also: https://lintian.debian.org/tags/upstream-metadata-missing-bug-tracking.html


Fixes: lintian: upstream-metadata-missing-repository
See-also: https://lintian.debian.org/tags/upstream-metadata-missing-repository.html

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

Fixes: lintian: insecure-copyright-format-uri
See-also: https://lintian.debian.org/tags/insecure-copyright-format-uri.html

Fixes: lintian: file-contains-trailing-whitespace
See-also: https://lintian.debian.org/tags/file-contains-trailing-whitespace.html

Isn't decided yet.

This reverts commit 1e72a4e0.