Fix use_relay_restrictions_maps typo
Fix use_relay_restrictions_maps typo

  Obvious fix.
gnowxilef/cookbook-postfix,mawatech/postfix,opscode-cookbooks/postfix,opscode-cookbooks/postfix,chrisjbray/postfix,chef-cookbooks/postfix,chef-cookbooks/postfix,chrisjbray/postfix,mawatech/postfix,gnowxilef/cookbook-postfix