Fix some issues reported by lintian

Fix some issues reported by lintian

• Use secure copyright file specification URI. (insecure-copyright-format-uri)
• Bump debhelper from deprecated 9 to 12. (package-uses-deprecated-debhelper-compat-version)
• Set debhelper-compat version in Build-Depends. (uses-debhelper-compat-file)
• Set upstream metadata fields: Bug-Database, Bug-Submit, Repository, Repository-Browse. (upstream-metadata-file-is-missing, upstream-metadata-missing-bug-tracking, upstream-metadata-missing-repository)

This merge proposal was created automatically by the Janitor bot.

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The bot will automatically update the merge proposal to resolve merge conflicts or close the merge proposal when all changes are applied through other means (e.g. cherry-picks). Updates may take several hours to propagate.

Build and test logs for this branch can be found at https://janitor.debian.net/lintian-fixes/pkg/lua-systemd/8f5b30a0-aa78-4c44-9f85-92f336ffb7c5.

Debdiff

These changes affect the binary packages:

[The following lists of changes regard files as different if they have different names, permissions or owners.]

Files in second set of .debs but not in first

-rw-r--r--  root/root   /usr/lib/debug/.build-id/35/cd5c0ea908b4cc45d7ac3bdd81b39bc5fbd0cc.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/63/137eef658e1bfbe7d598fd22d6c0d0a9e07b58.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/9d/13ffa0e73d11a986b28b38b5bf8fa5a3abfb2e.debug
-rw-r--r--  root/root   /usr/lib/debug/.dwz/x86_64-linux-gnu/lua-systemd.debug

Files in first set of .debs but not in second

-rw-r--r--  root/root   /usr/lib/debug/.build-id/3e/fcc8336e491432eb6463234f4e599cfd228eb2.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/52/09d146c842f1ed2f3ac1a1adaa835c7a82c91e.debug
-rw-r--r--  root/root   /usr/lib/debug/.build-id/a8/c9ceb1c30556f38d9fd07b15bc4a66bc0f81b2.debug

No differences were encountered between the control files of package **lua-systemd**

Control files of package lua-systemd-dbgsym: lines which differ (wdiff format)

• Build-Ids: 3efcc8336e491432eb6463234f4e599cfd228eb2 5209d146c842f1ed2f3ac1a1adaa835c7a82c91e a8c9ceb1c30556f38d9fd07b15bc4a66bc0f81b2 35cd5c0ea908b4cc45d7ac3bdd81b39bc5fbd0cc 63137eef658e1bfbe7d598fd22d6c0d0a9e07b58 9d13ffa0e73d11a986b28b38b5bf8fa5a3abfb2e

No differences were encountered between the control files of package **lua-systemd-dev**

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