MFH: r433041 r433042 r436493

databases/maria55*: reset maintainer

The maintainer was not involved in any of the last 13 releases and still
is not responding to PRs (many, many timeouts). Maintainership of this
port probably should have been reset a couple of years ago.

databases/mariadb55-client: Fix stage QA

Remove files from stage directory that aren't supposed to be packaged
to satisfy QA checks. No revump necessary.

PR: 214669

databases/mariadb55-server: Fix vulnerabilities

• Add vulnerability patch from upstream
• Improve OQGraph BROKEN message
• Take maintaintership

Security: 7c27192f-0bc3-11e7-9940-b499baebfeaf
Security: 4d2f9d09-ddb7-11e6-a9a5-b499baebfeaf
Security: CVE-2017-3313
Security: CVE-2017-3302

Approved by: ports-secteam (junovitch)