Hash related bug fixed inside Plugins#required?

libraries/plugins.rb

@@ -4,7 +4,7 @@ module Dovecot
     def self.required?(plugin, attrs)
       return true if attrs['conf'].has_key?('mail_plugins') and attrs['conf']['mail_plugins'].include?(plugin)
       attrs['protocols'].sort.each do |protocol, conf|
-        return true if conf.has_key?('mail_plugins') and conf['mail_plugins'].include?(plugin)
+        return true if conf.kind_of?(Hash) and conf.has_key?('mail_plugins') and conf['mail_plugins'].include?(plugin)
       end
       false
     end