antirez/redis — pull request #1566 by idning (2014-02-26 01:57:08+00:00)
Title: load rdb if aof not exist

when **Both** rdb and aof is enabled, redis can not load data from rdb file.

we do backup with rdb because it is compressed.
when I want to recover from backup, I just copy the rdb file, make sure aof file is not exists,
but redis does not load the rdb file.