Upgrade to vision 1.2.0

• json io: add stubs for formatters and printers
• dnsdedupe: implement formatters and parsers
• json io: dnsdedupe don't downcase names when parsing
• Merge pull request #11 from farsightsec/jsonio Implement format and parse functions for all custom print fields.

Nuke PORTSCOUNT= since it doesn't help. See PR 204135 for the
details about why portscount isn't currently working for this port's
MASTER_SITE.

Sponsored by: Farsight Security, Inc.