Fix some issues reported by lintian

Fix some issues reported by lintian

• Set upstream metadata fields: Bug-Database, Bug-Submit, Repository-Browse. (upstream-metadata-file-is-missing, upstream-metadata-missing-bug-tracking)
• Drop unnecessary dependency on dh-autoreconf.
• Update standards version to 4.6.1, no changes needed. (out-of-date-standards-version)

This merge proposal was created by the Janitor bot, and it will automatically rebase or close this proposal as appropriate when the target branch changes. Any comments you leave here will be read by the Janitor's maintainers.

Build and test logs for this branch can be found at https://janitor.debian.net/lintian-fixes/pkg/sockperf/4d226fd3-219a-4f8a-b5b4-c18dd7148fcb.

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/21/dd6a0b216492b177e7e53bd53fa6e8aa8213f8.debug

Files in first set of .debs but not in second

-rw-r--r--  root/root   /usr/lib/debug/.build-id/d4/d0b22f3fe8afffab71893b25d941c71559f2da.debug

No differences were encountered between the control files of package **sockperf**

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

• Build-Ids: d4d0b22f3fe8afffab71893b25d941c71559f2da 21dd6a0b216492b177e7e53bd53fa6e8aa8213f8

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