feat: nameserver-policy support multiple keys

e.g.,
  nameserver-policy: #   'www.baidu.com': '114.114.114.114'
    #   '+.internal.crop.com': '10.0.0.1'
    "geosite:cn,private,apple":
      - https://doh.pub/dns-query
      - https://dns.alidns.com/dns-query
    "www.baidu.com,+.google.cn":
      - 223.5.5.5
      - 1.1.1.1

config/config.go

@@ -4,11 +4,11 @@ import (
 	"container/list"
 	"errors"
 	"fmt"
-
 	"net"
 	"net/netip"
 	"net/url"
 	"os"
+	"regexp"
 	"runtime"
 	"strconv"
 	"strings"
@@ -985,8 +985,33 @@ func parsePureDNSServer(server string) string {
 }
 func parseNameServerPolicy(nsPolicy map[string]any, preferH3 bool) (map[string][]dns.NameServer, error) {
 	policy := map[string][]dns.NameServer{}
+	updatedPolicy := make(map[string]interface{})
+	re := regexp.MustCompile(`[a-zA-Z0-9\-]+\.[a-zA-Z]{2,}(\.[a-zA-Z]{2,})?`)
+
+	for k, v := range nsPolicy {
+		if strings.Contains(k, "geosite:") {
+			subkeys := strings.Split(k, ":")
+			subkeys = subkeys[1:]
+			subkeys = strings.Split(subkeys[0], ",")
+			//log.Infoln("subkeys:%+v", subkeys)
+			for _, subkey := range subkeys {
+				newKey := "geosite:" + subkey
+				//log.Infoln("newKey:%+v", newKey)
+				updatedPolicy[newKey] = v
+			}
+		} else if re.MatchString(k) {
+			subkeys := strings.Split(k, ",")
+			//log.Infoln("subkeys:%+v", subkeys)
+			for _, subkey := range subkeys {
+				updatedPolicy[subkey] = v
+			}
+		} else {
+			updatedPolicy[k] = v
+		}
+	}
+	//log.Infoln("updatedPolicy:%+v", updatedPolicy)
 
-	for domain, server := range nsPolicy {
+	for domain, server := range updatedPolicy {
 
 		servers, err := utils.ToStringSlice(server)
 		if err != nil {

docs/config.yaml

@@ -231,12 +231,13 @@ dns:
   #     - '+.youtube.com'
 
   # 配置查询域名使用的 DNS 服务器
-  nameserver-policy: #   'www.baidu.com': '114.114.114.114'
+  nameserver-policy:
+    #   'www.baidu.com': '114.114.114.114'
     #   '+.internal.crop.com': '10.0.0.1'
-    "geosite:cn":
+    "geosite:cn,private,apple":
       - https://doh.pub/dns-query
       - https://dns.alidns.com/dns-query
-    "www.baidu.com": [https://doh.pub/dns-query, https://dns.alidns.com/dns-query]
+    "www.baidu.com,+.google.cn": [223.5.5.5, https://dns.alidns.com/dns-query]
 
 proxies: # socks5
   - name: "socks"