Fix some issues reported by lintian

Fix some issues reported by lintian

• debian/copyright: Replace commas with whitespace to separate items in Files paragraph. (comma-separated-files-in-dep5-copyright)

• Set upstream metadata fields: Archive, Bug-Database, Bug-Submit, Name, Repository, Repository-Browse. (upstream-metadata-file-is-missing, upstream-metadata-missing-bug-tracking, upstream-metadata-missing-repository)

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Build and test logs for this branch can be found at https://janitor.debian.net/lintian-fixes/pkg/pykcs11/92c433ee-070f-4989-b911-38e91c077b67.

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/cc/943186e17c0af6869aeedc464c0206c9bed870.debug

Files in first set of .debs but not in second

-rw-r--r--  root/root   /usr/lib/debug/.build-id/bb/8321601fd0187d59f321bc1f2a31abe19346f1.debug

No differences were encountered between the control files of package **python3-pykcs11**

Control files of package python3-pykcs11-dbgsym: lines which differ (wdiff format)

• Build-Ids: bb8321601fd0187d59f321bc1f2a31abe19346f1 cc943186e17c0af6869aeedc464c0206c9bed870

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