Proposed commit log:
mail/opensmtpd-extras: Update to 2016-05-18 snapshot - Update to version 201605182041 - Remove post-patch for -clamav -spamassassin (is now configurable) - Remove post-patch for -regex (fixed upstream) - USE_MYSQL to USES= mysql Reviewed_by: gahr (maintainer), adamw Approved by: adamw, Differential_Revision: D6462