Patch in: 6c5ad2541195c9f59e8ff04a50cc8f98e7741e87

commit 6c5ad2541195c9f59e8ff04a50cc8f98e7741e87
Author: Megh Bhatt <meghb@ubuntu-build02.(none)>
Date:   Thu Mar 6 20:28:07 2014 -0800

    1. Build hiredis with -g to aid in debugging
    2. Call redisAsyncFree instead of redisAsyncDisconnect when
       destroying RedisAsyncConnection since redisAsyncDisconnect
       expects clean disconnect with redis server and this may
       not happen on master switchover