Fix some issues reported by lintian

Fix some issues reported by lintian

• Use secure URI in Homepage field. (homepage-field-uses-insecure-uri)

• Set field Upstream-Contact in debian/copyright.

• Set upstream metadata fields: Bug-Database, Bug-Submit, Security-Contact. (upstream-metadata-missing-bug-tracking)

• Remove obsolete field Contact from debian/upstream/metadata (already present in machine-readable debian/copyright).

• Update standards version to 4.6.1, no changes needed. (out-of-date-standards-version)

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/flatbuffers/ea3f010e-30d1-4b76-a0d7-e4c0c5952b94.

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/python3/dist-packages/flatbuffers-2.0.6_dfsg1_3_jan_lint1.egg-info/PKG-INFO
-rw-r--r--  root/root   /usr/lib/python3/dist-packages/flatbuffers-2.0.6_dfsg1_3_jan_lint1.egg-info/dependency_links.txt
-rw-r--r--  root/root   /usr/lib/python3/dist-packages/flatbuffers-2.0.6_dfsg1_3_jan_lint1.egg-info/top_level.txt

Files in first set of .debs but not in second

-rw-r--r--  root/root   /usr/lib/python3/dist-packages/flatbuffers-2.0.6_dfsg1_3_jan_unchanged1.egg-info/PKG-INFO
-rw-r--r--  root/root   /usr/lib/python3/dist-packages/flatbuffers-2.0.6_dfsg1_3_jan_unchanged1.egg-info/dependency_links.txt
-rw-r--r--  root/root   /usr/lib/python3/dist-packages/flatbuffers-2.0.6_dfsg1_3_jan_unchanged1.egg-info/top_level.txt

Control files of package flatbuffers-compiler: lines which differ (wdiff format)

• Homepage: http​://google.github.io/flatbuffers/ https​://google.github.io/flatbuffers/

No differences were encountered between the control files of package **flatbuffers-compiler-dbgsym**

Control files of package flatbuffers-compiler-dev: lines which differ (wdiff format)

• Homepage: http​://google.github.io/flatbuffers/ https​://google.github.io/flatbuffers/

Control files of package libflatbuffers-dev: lines which differ (wdiff format)

• Homepage: http​://google.github.io/flatbuffers/ https​://google.github.io/flatbuffers/

Control files of package libflatbuffers2: lines which differ (wdiff format)

• Homepage: http​://google.github.io/flatbuffers/ https​://google.github.io/flatbuffers/

No differences were encountered between the control files of package **libflatbuffers2-dbgsym**

Control files of package python3-flatbuffers: lines which differ (wdiff format)

• Homepage: http​://google.github.io/flatbuffers/ https​://google.github.io/flatbuffers/

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