Patch in:
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
(cherry picked from commit 87305ef72578c36d930418a9fa46a1ed5db66bbc)