[conformal/btcd] a4a793: Add support for getmininginfo RPC.

[Dave Collins]

  Branch: refs/heads/master
  Home:   https://github.com/conformal/btcd
  Commit: a4a79387ccaee79cb4d760bc53d05742d468cd98
      
https://github.com/conformal/btcd/commit/a4a79387ccaee79cb4d760bc53d05742d468cd98
  Author: Dave Collins <da...@conformal.com>
  Date:   2014-05-04 (Sun, 04 May 2014)

  Changed paths:
    M mempool.go
    M rpcserver.go

  Log Message:
  -----------
  Add support for getmininginfo RPC.

Closes #126.