Fixed a problem in the script engine that crashed the server if the reply was not stored just int the static buffer of the client structure.

Eval command table fixed to return the keys arguments of the command. We use zunionInterGetKeys() as it ZUNION/ZINTER have exactly the same semantic with a prefixed number of keys followed by key names.

Fixed nul bulk parsing in Redis protocol to Lua type convertion. Check for bad Lua types as arguements of the redis() Lua command.

Fixed arity detection of Redis command executed from Lua script. Error reporting from Lua fixed. More work on the Redis reply to lua conversion code.

full conversion from Lua return value to redis reply. Partial conversion from Redis reply to Lua type.

when creating not connected clients do not add them into the clients list, otherwise they will be subject to timeouts and other stuff

Correctly glue the reply buffer. For now returned as it is to Lua, but will be converted into Lua native type later.

Lua call of Redis command work in progress: sorry I have to go to the cinema to watch the Source Code movie

Fix for Pub/Sub system, introduced in Redis 2.2.6 with the new copy-on-write safe iterator semantics. In the hope this is the last bug I introduced this way.

Fix for a possible bug related to ZINTER/UNIONSTORE called with the same source set more than one time.

removed assert causing an illegal memory access. This was responsible of crashes during BLPOP and other list blocking operations.

RDB version signature bumped to 2, now that direct saving of specially encoded types is implemented 2.2 instances are no longer able to read rdb files produced by 2.4 or unstable.

Introduced a safe iterator interface that can be used to iterate while accessing the dictionary at the same time. Now the default interface is consireded unsafe and should be used only with dictNext()

DEBUG DIGEST additional lookup needed for VM removed from unstable branch that does not have VM at all

when Redis fails accepting a new connection reports the error at WARNING and not VERBOSE error level. Thanks to offby1 for proposing this in the Redis mailing list. #backport-candidate