Shared-memory session storage among nginx worker processes.
(->SharedMemoryStore delayed-smap)
Positional factory function for class nginx.clojure.session.SharedMemoryStore.
(shared-map-store name)
Creates an shared map based session storage engine. `name` is a shared map name declared in the nginx.conf. See [shared map](http://nginx-clojure.github.io/directives.html#shared_map)