databases/mysql80-{client, server}: Update to latest release 8.0.17
This update includes security fixes on issues that are
mentioned on upstream critical patch report.
Further info:
https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html#AppendixMSQL
Delete upstream-merged patches
Change other local-patches according upstream changes
PR: 239272
Reported by: Markus Kohlmeyer <rootservice@gmail.com>
Sponsored by: EuroBSDCon 2019 DevSummit