Fix some issues reported by lintian

Fix some issues reported by lintian

• Use secure URI in Homepage field. (homepage-field-uses-insecure-uri)
• Set upstream metadata fields: Bug-Submit (from ./configure).
• Update standards version to 4.6.2, no changes needed. (out-of-date-standards-version)

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/34/3e54185a3ddf0a24d0dcbe906c8ea73b766a56.debug

Files in first set of .debs but not in second

-rw-r--r--  root/root   /usr/lib/debug/.build-id/7d/fdf038d5012e92c4f5dca2d9bbd9607cc0ea79.debug

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

• Homepage: [-http​://idjc.sourceforge.net-] {+https​://idjc.sourceforge.net+}

Control files of package libshout-idjc3: lines which differ (wdiff format)

• Homepage: [-http​://idjc.sourceforge.net-] {+https​://idjc.sourceforge.net+}

Control files of package libshout-idjc3-dbgsym: lines which differ (wdiff format)

• Build-Ids: 7dfdf038d5012e92c4f5dca2d9bbd9607cc0ea79 343e54185a3ddf0a24d0dcbe906c8ea73b766a56

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Build and test logs for this branch can be found at https://janitor.debian.net/lintian-fixes/pkg/libshout-idjc/aa0549cc-e118-4e16-ba63-fc31e90d6f6e.