Allow all client_id_strategy options and add server_id_strategy (#653)

src/main/resources/application.yaml

@@ -139,6 +139,7 @@ hapi:
     #    etag_support_enabled: true
     #    expunge_enabled: true
     #    client_id_strategy: ALPHANUMERIC
+    #    server_id_strategy: SEQUENTIAL_NUMERIC
     #    fhirpath_interceptor_enabled: false
     #    filter_search_enabled: true
     #    graphql_enabled: true