Issue Description:

In the s-c-f implementation of Host, .current() will never have names populated. This is different to the implementation on macOS. As an example, in macOS:

  1> import Foundation
  2> Host.current().names
$R0: [String] = 3 values {
  [0] = "macbook-pro.local"
  [1] = "MacBook-Pro.local"
  [2] = "localhost"
}

Whereas on Linux:

  1> import Foundation
  2> Host.current().names
$R0: [String] = 0 values

This appears to happen because _resolveCurrent simply never puts anything in the names. At the very least it could put the _info field in there, as for .current() that's always derived from currentHostName