MFH: r460854 r462058 r463796 r465914

www/node6: Update 6.12.2 -> 6.12.3

https://nodejs.org/en/blog/release/v6.12.3/

While here, pet portlint:

• move ONLY_FOR_ARCHS
• remove USES_LDCONFIG (node.js doesn't install a .so)

Differential Revision: https://reviews.freebsd.org/D13774

www/node6: Update 6.12.3 -> 6.13.0

https://nodejs.org/en/blog/release/v6.13.0/

www/node: Update 6.13.0 -> 6.13.1

Notable changes:

• http, tls: better support for IPv6 addresses

https://nodejs.org/en/blog/release/v6.13.1/

www/node6: Update 6.13.1 -> 6.14.0

This is a security release addressing multiple vulnerabilities. Users
are recommended to upgrade as soon as possible.

https://nodejs.org/en/blog/vulnerability/march-2018-security-releases/
https://nodejs.org/en/blog/release/v6.14.0/

Security: 5a9bbb6e-32d3-11e8-a769-6daaba161086

Approved by: ports-secteam (riggs)