Remove unnecessary constraints

See merge request !1

* Build-Depends: Drop versioned constraint on libspeechd-dev.

Changes-By: deb-scrub-obsolete

* license-problem-gfdl-invariants


Changes-By: lintian-brush
Fixes: lintian: unused-override
See-also: https://lintian.debian.org/tags/unused-override.html

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

Changes-By: lintian-brush
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

Changes-By: lintian-brush
Fixes: lintian: old-source-override-location
See-also: https://lintian.debian.org/tags/old-source-override-location.html

Changes-By: lintian-brush
Fixes: lintian: trailing-whitespace
See-also: https://lintian.debian.org/tags/trailing-whitespace.html

(Closes: Bug#969488)

(Closes: Bug#957832)

  * control: Build-Depend on help2man.
  * patches/help2man: Generate manpage from help.
  * manpages: Install manpage.