Allow multiple backends

lib/policy/policy.go

@@ -43,4 +43,6 @@ type Policy struct {
 	Challenges map[string]Challenge `yaml:"challenges"`
 
 	Rules []Rule `yaml:"rules"`
+
+	Backends map[string]string `json:"backends"`
 }

lib/policy/rule.go

@@ -12,6 +12,7 @@ const (
 
 type Rule struct {
 	Name       string   `yaml:"name"`
+	Host       *string  `yaml:"host"`
 	Conditions []string `yaml:"conditions"`
 
 	Action string `yaml:"action"`