Fix some issues reported by lintian

Fix some issues reported by lintian

• Update watch file format version to 4. (older-debian-watch-file-standard)

• Bump debhelper from deprecated 9 to 13. (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-Browse. (upstream-metadata-file-is-missing, upstream-metadata-missing-bug-tracking)

• Update pattern for GitHub archive URLs from ///tags page///archive/ -> ///archive/refs/tags/.

• debian/watch: Use GitHub /tags rather than /releases page.

This merge proposal was created automatically by the Janitor bot. For more information, including instructions on how to disable these merge proposals, see https://janitor.debian.net/lintian-fixes.

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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/lsyncd/50d2f09a-37d2-4287-9db0-c23b4b7668b0.

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/91/696bc4ed55710c3fe4714d4164eaabf54f3856.debug

Files in first set of .debs but not in second

-rw-r--r--  root/root   /usr/lib/debug/.build-id/90/9322e92706bc8f2a5223a923cb4dcc3f0e5b4a.debug

No differences were encountered between the control files of package **lsyncd**

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

• Build-Ids: 909322e92706bc8f2a5223a923cb4dcc3f0e5b4a 91696bc4ed55710c3fe4714d4164eaabf54f3856

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