[btcsuite/btcd] 2dfb4b: rpcserver: Increase getblock difficulty prec to 8.

[Dave Collins]

  Branch: refs/heads/master
  Home:   https://github.com/btcsuite/btcd
  Commit: 2dfb4be707106a48be78273269ffcf551499988c
      
https://github.com/btcsuite/btcd/commit/2dfb4be707106a48be78273269ffcf551499988c
  Author: Dave Collins <da...@conformal.com>
  Date:   2015-05-04 (Mon, 04 May 2015)

  Changed paths:
    M rpcserver.go

  Log Message:
  -----------
  rpcserver: Increase getblock difficulty prec to 8.

This commit increases the precision of the difficulty field of the
getblock RPC to 8 to match Bitcoin Core.

Closes #414.