OAK-5923: Document S3 datastore
OAK-5923: Document S3 datastore

Documented missing S3 specific properties

git-svn-id: 67138be12999c61558c3dd34328380c8e4523e73@1837789 13f79535-47bb-0310-9956-ffa450edef68

stillalex/jackrabbit-oak,alexparvulescu/jackrabbit-oak,stillalex/jackrabbit-oak,stillalex/jackrabbit-oak,francescomari/jackrabbit-oak,alexkli/jackrabbit-oak,francescomari/jackrabbit-oak,anchela/jackrabbit-oak,alexparvulescu/jackrabbit-oak,francescomari/jackrabbit-oak,alexparvulescu/jackrabbit-oak,francescomari/jackrabbit-oak,anchela/jackrabbit-oak,alexkli/jackrabbit-oak,anchela/jackrabbit-oak,alexparvulescu/jackrabbit-oak,francescomari/jackrabbit-oak,alexparvulescu/jackrabbit-oak,anchela/jackrabbit-oak,stillalex/jackrabbit-oak,alexkli/jackrabbit-oak,alexkli/jackrabbit-oak,stillalex/jackrabbit-oak,alexkli/jackrabbit-oak,anchela/jackrabbit-oak