Fix some issues reported by lintian

Janitorrequested to merge
(removed):lintian-fixes into debian/train

Fix some issues reported by lintian

  • Drop unnecessary dependency on dh-autoconf.
  • Use secure URI in Homepage field.
  • Set upstream metadata fields: Repository-Browse.

This merge proposal was created automatically by the Janitor bot (https://janitor.debian.net/lintian-fixes).

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Build and test logs for this branch can be found at https://janitor.debian.net/lintian-fixes/pkg/subunit/79f2ff53-deea-4907-85bf-58ba078ca058.

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