[btcsuite/btcd] 1ddf8e: Correct reconnect handling for persistent peers.

[Dave Collins]

  Branch: refs/heads/master
  Home:   https://github.com/btcsuite/btcd
  Commit: 1ddf8e8edf0b0de7da442c106058181aa5692217
      
https://github.com/btcsuite/btcd/commit/1ddf8e8edf0b0de7da442c106058181aa5692217
  Author: Dave Collins <da...@conformal.com>
  Date:   2015-07-20 (Mon, 20 Jul 2015)

  Changed paths:
    M peer.go
    M server.go

  Log Message:
  -----------
  Correct reconnect handling for persistent peers.

This commit correctly replaces persistent peers that are being retried in
the list of persistent peers so it will continue to be retried as
intended.

Also, limit the maximum retry interval for persistent peers to 5 minutes.

Fixes #463.