async.queue's task callbacks recursion bug

[mystorp]

async.queue.
once a task finished, the wraped _next call q.process synchronous, when there has many many tasks, these goes to : RangeError: Maximum call stack size exceeded

[aearly]

Sorry, but we're moving in the other direction. We used to do this, but now we now always assume async task functions in the queue for performance reasons. (#696, and see note here) You'll have to use process.nextTick in your own queue processing function.