this is for supporting external plugins.
external plugins will depend on a few telegraf interface types, as well
as a common telegraf registry.
this will allow external and internal plugins to both share this package
and make it easier to vendor/version the whole thing semantically, which
will make it easier to keep plugins supported across build and telegraf
versions.
see #1717
* WIP: Initial support for ZFS on FreeBSD
* Added build directives
* Ignore 'kstatPath' config option on FreeBSD
* Added tests for ZFS FreeBSD input plugin.
* Updated the README to confrom with the guidelines and added FreeBSD info
* Fixed indents
* Spell check