[btcsuite/btcd] aa03d6: peer: Correct a few typos in documentation.

[Dave Collins]

  Branch: refs/heads/master
  Home:   https://github.com/btcsuite/btcd
  Commit: aa03d68e1e2be9f53655cd466edf81c64e573085
      
https://github.com/btcsuite/btcd/commit/aa03d68e1e2be9f53655cd466edf81c64e573085
  Author: Dave Collins <da...@conformal.com>
  Date:   2015-10-23 (Fri, 23 Oct 2015)

  Changed paths:
    M peer/doc.go

  Log Message:
  -----------
  peer: Correct a few typos in documentation.