Fix some issues reported by lintian

Fix some issues reported by lintian

• Update lintian override info format in d/abgate.lintian-overrides on line 3-6. (mismatched-override)
• Update standards version to 4.6.1, no changes needed. (out-of-date-standards-version)

This merge proposal was created by the Janitor bot, and it will automatically rebase or close this proposal as appropriate when the target branch changes. Any comments you leave here will be read by the Janitor's maintainers.

Build and test logs for this branch can be found at https://janitor.debian.net/lintian-fixes/pkg/abgate/3bca482f-7dfe-4ea4-83de-29b22a9042e9.

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/e1/e305b8a459b8f847ec8d7801f3a6f5314e0584.debug

Files in first set of .debs but not in second

-rw-r--r--  root/root   /usr/lib/debug/.build-id/b2/66a3b5617c7e0a0c0271398e5b2b31022a0bb6.debug

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

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

• Build-Ids: 8ceae9aab434940ed5e3894e3bf0270110882b17 b266a3b5617c7e0a0c0271398e5b2b31022a0bb6 be24353c296705014c3af1e1dc724d8bcd300cbb e1e305b8a459b8f847ec8d7801f3a6f5314e0584

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