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-Name in debian/copyright.

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Build and test logs for this branch can be found at https://janitor.debian.net/lintian-fixes/pkg/ifmetric/fc5512c4-0be2-4ec8-a283-56372caeabed.

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/39/a2f21a8aaff92da45065345b0cfc7274b67975.debug

Files in first set of .debs but not in second

-rw-r--r--  root/root   /usr/lib/debug/.build-id/45/e200141344558a74e1c5b8f86e9918f4c1d853.debug

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

• Homepage: [-http​://0pointer.de/lennart/projects/ifmetric/-] {+https​://0pointer.de/lennart/projects/ifmetric/+}

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

• Build-Ids: 45e200141344558a74e1c5b8f86e9918f4c1d853 39a2f21a8aaff92da45065345b0cfc7274b67975

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