while loading the rdb file don't add the key to the dictionary at all if it's already expired, instead of removing it just after the insertion.

swap objects out directly while loading an RDB file if we detect we can't stay in the vm max memory limits anyway

AOF writes are now accumulated into a buffer and flushed into disk just before re-entering the event loop. A lot less writes but still this guarantees that AOF is written before the client gets a positive reply about a write operation, as no reply is trasnmitted before re-entering into the event loop.

AOF is now rewritten on slave after SYNC with master. Thanks to @_km for finding this bug and any others'

redis-cli now is able to also output the string representation instead of the raw string. Much better for debugging