net-dns/knot: bump to 2.8.4

[nemunaire]

Hi!

This is just a simple bump for knot.

[gentoo-bot]

Pull Request assignment

Submitter: @nemunaire
Areas affected: ebuilds
Packages affected: net-dns/knot

net-dns/knot: @nemunaire, @gentoo/proxy-maint

Linked bugs

No bugs to link found. If your pull request references any of the Gentoo bug reports, please add appropriate GLEP 66 tags to the commit message and request reassignment.

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Docs: Code of Conduct ● Copyright policy (expl.) ● Devmanual ● GitHub PRs ● Proxy-maint guide

[gentoo-repo-qa-bot]

Pull request CI report

Report generated at: 2019-09-30 17:39 UTC
Newest commit scanned: 73ff7a9
Status: ✅ good

Issues already there before the PR (double-check them):
https://qa-reports.gentoo.org/output/gentoo-ci/628fcf4/output.html#games-action/crimsonland
https://qa-reports.gentoo.org/output/gentoo-ci/628fcf4/output.html#games-roguelike/neon-chrome

[juippis]

 * One or more empty directories installed to /var:
 *
 *   /var/lib
 *   /var/lib/knot
 *
 * If those directories need to be preserved, please make sure to create
 * or mark them for keeping using 'keepdir'. Future versions of Portage
 * will strip empty directories from installation image.

Wonder where these are coming from.