Module Persistent_connection

A persistent connection is one that is automatically reestablished whenever lost.

module type Connection_error = Persistent_connection_kernel.Connection_error
module type S'_without_create = Persistent_connection_kernel.S'_without_create
module type S_without_create = sig ... end
module type S = sig ... end
module type S' = sig ... end
module type S_rpc = sig ... end