[conformal/btcd] dfbb94: Ensure Win service bits only compile on Windows.

[Dave Collins]

  Branch: refs/heads/master
  Home:   https://github.com/conformal/btcd
  Commit: dfbb9446c44d39eb0045fb786eca773341b14c0f
      
https://github.com/conformal/btcd/commit/dfbb9446c44d39eb0045fb786eca773341b14c0f
  Author: Dave Collins <da...@conformal.com>
  Date:   2013-11-25 (Mon, 25 Nov 2013)

  Changed paths:
    M btcd.go
    M config.go
    M service_windows.go

  Log Message:
  -----------
  Ensure Win service bits only compile on Windows.