[btcsuite/btcd] 4f12c9: Drop btcsuite/go-flags in favor of upstream

[David Hill]

  Branch: refs/heads/master
  Home:   https://github.com/btcsuite/btcd
  Commit: 4f12c97d0f198ee99794cadfe7b547fd75d88847
      
https://github.com/btcsuite/btcd/commit/4f12c97d0f198ee99794cadfe7b547fd75d88847
  Author: David Hill <dh...@mindcry.org>
  Date:   2017-01-09 (Mon, 09 Jan 2017)

  Changed paths:
    M cmd/addblock/config.go
    M cmd/btcctl/config.go
    M cmd/findcheckpoint/config.go
    M cmd/gencerts/gencerts.go
    M config.go
    M database/cmd/dbtool/main.go
    M glide.lock
    M glide.yaml

  Log Message:
  -----------
  Drop btcsuite/go-flags in favor of upstream