[rabbitmq-discuss] Erlang R12B and new persister

[tsuraan]

> Having checked the code, the update_element calls in msg_store and
> msg_store_gc could be worked around. The update_element in
> msg_store_ets_index can't be, but if you use the rabbitmq-toke plugin
> then that avoids that.

If the update_element makes the code cleaner or makes it work better,
that's probably best. It sounds like upgrading to R13B3 is a really
good idea for the gc behaviour, so I'd imagine I'll have to do the
upgrade either way :)