Pass the redis configuration to the initializer as a hash read

straight from the yaml file, instead of as a string that must be
split on :. This allows us to specify a database index to use,
instead of simply falling back to the default 0 database.

Update the redis example configuration to match.

config/initializers/gem-plugin_config/redis.rb

@@ -10,8 +10,7 @@
 end
 
 redis_config = YAML.load_file(rails_root + '/config/redis.yml')
-redis_host, redis_port = redis_config[rails_env].split(":")
-$redis = Redis.new(:host => redis_host, :port => redis_port)
+$redis = Redis.new(redis_config[rails_env])
 
 
 

config/redis.example

@@ -1,3 +1,12 @@
-test: dev.ao3.org:6398
-development: dev.ao3.org:6379
-production: redis.ao3.org:6379
+test:
+    :host: dev.ao3.org
+    :port: 6398
+    :db: 0
+development:
+    :host: dev.ao3.org
+    :port: 6379
+    :db: 0
+production:
+    :host: redis.ao3.org
+    :port: 6379
+    :db: 0