Fix some issues reported by lintian

Fix some issues reported by lintian

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

• Bump debhelper from old 12 to 13. (package-uses-old-debhelper-compat-version)

• 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 (out-of-date-standards-version)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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Build and test logs for this branch can be found at https://janitor.debian.net/lintian-fixes/pkg/fsplib/88b15409-347f-4862-b122-8d5d4ff5e1f0.

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/a6/3dde7d517d7ae09ab4a2e2e0c0db7fc5cf67aa.debug

Files in first set of .debs but not in second

-rw-r--r--  root/root   /usr/lib/debug/.build-id/22/a1772cfd192f14b41e8eba5615e082d51b9be5.debug

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

• Homepage: http​://fsp.sourceforge.net/ https​://fsp.sourceforge.net/

Control files of package libfsplib0: lines which differ (wdiff format)

• Homepage: http​://fsp.sourceforge.net/ https​://fsp.sourceforge.net/

Control files of package libfsplib0-dbgsym: lines which differ (wdiff format)

• Build-Ids: 22a1772cfd192f14b41e8eba5615e082d51b9be5 a63dde7d517d7ae09ab4a2e2e0c0db7fc5cf67aa

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