Description of RPC configuration options

Configuration option = Default value	Description
[DEFAULT]
matchmaker_heartbeat_freq = 300	(IntOpt) Heartbeat frequency.
matchmaker_heartbeat_ttl = 600	(IntOpt) Heartbeat time-to-live.
rpc_backend = rabbit	(StrOpt) The messaging driver to use, defaults to rabbit. Other drivers include qpid and zmq.
rpc_cast_timeout = 30	(IntOpt) Seconds to wait before a cast expires (TTL). Only supported by impl_zmq.
rpc_conn_pool_size = 30	(IntOpt) Size of RPC connection pool.
rpc_response_timeout = 60	(IntOpt) Seconds to wait for a response from a call.
rpc_thread_pool_size = 64	(IntOpt) Size of RPC greenthread pool.
[cells]
rpc_driver_queue_base = cells.intercell	(StrOpt) Base queue name to use when communicating between cells. Various topics by message type will be appended to this.
[upgrade_levels]
baseapi = None	(StrOpt) Set a version cap for messages sent to the base api in any service