[conformal/btcd] d18c34: Mask the password from btcctl usage.

[Dave Collins]

  Branch: refs/heads/master
  Home:   https://github.com/conformal/btcd
  Commit: d18c34a6289742d4665c12c31df54e947fbf1044
      
https://github.com/conformal/btcd/commit/d18c34a6289742d4665c12c31df54e947fbf1044
  Author: Dave Collins <da...@conformal.com>
  Date:   2013-11-19 (Tue, 19 Nov 2013)

  Changed paths:
    M util/btcctl/config.go

  Log Message:
  -----------
  Mask the password from btcctl usage.