antirez/redis — pull request #1079 by charsyam (2013-04-30 03:13:54+00:00)
Title: fixing aofrewrite bug

```c
When key has expiretime which is smaller than now(), it just add "*3\r\n$3\r\nSET\r\n" and
not to add "PEXPIREAT"
```

This patch is based on REDIS-DB group's topic: https://groups.google.com/forum/?fromgroups=#!topic/redis-db/Kvh2FAGK4Uk

and I think it is a bug. Thank you.