[conformal/btcd] b5a7d5: Add comments to Tor discovery errors.

[Dave Collins]

  Branch: refs/heads/master
  Home:   https://github.com/conformal/btcd
  Commit: b5a7d52f21448d4307f37eee0801f4e71aba46b8
      
https://github.com/conformal/btcd/commit/b5a7d52f21448d4307f37eee0801f4e71aba46b8
  Author: Dave Collins <da...@conformal.com>
  Date:   2015-01-16 (Fri, 16 Jan 2015)

  Changed paths:
    M discovery.go

  Log Message:
  -----------
  Add comments to Tor discovery errors.