Upgrade strfry to 1.1.1

Remove obsolete dependencies, introduce new config attributes, improve
comments for existing config

attributes/default.rb

@@ -1,5 +1,5 @@
 node.default["strfry"]["repo"] = "https://github.com/hoytech/strfry.git"
-node.default["strfry"]["revision"] = "1.0.1"
+node.default["strfry"]["revision"] = "1.1.1"
 node.default["strfry"]["download_url"] = nil
 node.default["strfry"]["checksum"] = nil
 node.default["strfry"]["user"] = "strfry"
@@ -9,11 +9,13 @@ node.default["strfry"]["config"] = {
   # db_params: {},
   # events: {},
   # relay: {
+  #   auth: {},
   #   info: {},
-  #   writePolicy: {},
+  #   write_policy: {},
   #   compression: {},
   #   logging: {},
   #   num_threads: {},
-  #   negentropy: {}
+  #   negentropy: {},
+  #   filter_validation: {}
   # }
 }