Standardize `userland` vs. `user-land`

[Trott]

userland appears in several places in Node.js, but user-land also appears in a few places. Should standardize on one or the other.

[JungMinu]

@Trott I'll take care of this 😄

[Trott]

Thanks but a first time contributor already has a PR in for it!
On Tue, Oct 6, 2015 at 5:36 AM Minwoo Jung notifications@github.com wrote:

@Trott https://github.com/Trott I'll take care of this [image: 😄]

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#3189 (comment).

[JungMinu]

@Trott That's fine