[btcsuite/btcd] 9d6d0e: Keep track of peers with maps instead of lists.

[David Hill]

  Branch: refs/heads/master
  Home:   https://github.com/btcsuite/btcd
  Commit: 9d6d0e4006f955984b52f042d95303c980fd6552
      
https://github.com/btcsuite/btcd/commit/9d6d0e4006f955984b52f042d95303c980fd6552
  Author: David Hill <dh...@mindcry.org>
  Date:   2015-05-21 (Thu, 21 May 2015)

  Changed paths:
    M server.go

  Log Message:
  -----------
  Keep track of peers with maps instead of lists.