[btcsuite/btcd] 7996eb: peer: drain chans before exiting peerHandler

[Javed Khan]

  Branch: refs/heads/master
  Home:   https://github.com/btcsuite/btcd
  Commit: 7996eb1f9deee90a070e2d6455c71bd5738192f5
      
https://github.com/btcsuite/btcd/commit/7996eb1f9deee90a070e2d6455c71bd5738192f5
  Author: Javed Khan <tuxcan...@gmail.com>
  Date:   2016-01-06 (Wed, 06 Jan 2016)

  Changed paths:
    M server.go

  Log Message:
  -----------
  peer: drain chans before exiting peerHandler

Also disconnect the failed peer to allow the peerDoneHandler goroutine
to exit, instead of hanging around. Fixes #583.