Use a safe iterator while saving the DB, since the getExpire() function will access the iterating dictionary.

Make sure error and status replies emitted by Lua scripts can never have more than a newline, otherwise it is a protocol violation and clients will desync.

AOF log rewriting in slave performed after a successful sych with the master was misplaced. Now it happens at the right time.

Fix for issue 516, rewriting the command vector to correctly repliate BRPOPLPUSH. Still to test everything, especially edge cases

Lua max exec time fixes: redisLog() to log the event moved before the lua_error() call that does a long jump so never returns. Aesthetic fixes in error message.

call the Lua hook with minor frequency. It is already enough to call it every 100000 istructions for near millisecond precision.

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.