[conformal/btcd] 1e75cc: Update for recent btcwire AddUserAgent addition.

[Dave Collins]

  Branch: refs/heads/master
  Home:   https://github.com/conformal/btcd
  Commit: 1e75ccc9b999f9a84fbca1e9d281dde2f357eeba
      
https://github.com/conformal/btcd/commit/1e75ccc9b999f9a84fbca1e9d281dde2f357eeba
  Author: Dave Collins <da...@conformal.com>
  Date:   2014-04-20 (Sun, 20 Apr 2014)

  Changed paths:
    M peer.go

  Log Message:
  -----------
  Update for recent btcwire AddUserAgent addition.