缓存设置中可以设置缓存主域名，用来复用多域名下的缓存

pkg/serverconfigs/http_cache_key_config.go

@@ -0,0 +1,14 @@
+// Copyright 2023 GoEdge CDN goedge.cdn@gmail.com. All rights reserved. Official site: https://goedge.cn .
+
+package serverconfigs
+
+// HTTPCacheKeyConfig 缓存Key配置
+type HTTPCacheKeyConfig struct {
+	IsOn   bool   `yaml:"isOn" json:"isOn"`
+	Scheme string `yaml:"scheme" json:"scheme"`
+	Host   string `yaml:"host" json:"host"`
+}
+
+func (this *HTTPCacheKeyConfig) Init() error {
+	return nil
+}