Make all config values configurable

And use a standard scheme for variable/key naming

attributes/default.rb

@@ -4,8 +4,16 @@ node.default["strfry"]["download_url"] = nil
 node.default["strfry"]["checksum"] = nil
 node.default["strfry"]["user"] = "strfry"
 node.default["strfry"]["group"] = "strfry"
-node.default["strfry"]["db_path"] = "/var/lib/strfry"
-node.default["strfry"]["bind_ip"] = "0.0.0.0"
-node.default["strfry"]["real_ip_header"] = ""
-node.default["strfry"]["info"] = {}
-node.default["strfry"]["policy_path"] = ""
+node.default["strfry"]["config"] = {
+  db: "/var/lib/strfry"
+  # db_params: {},
+  # events: {},
+  # relay: {
+  #   info: {},
+  #   writePolicy: {},
+  #   compression: {},
+  #   logging: {},
+  #   num_threads: {},
+  #   negentropy: {}
+  # }
+}