feat: nameserver-policy support use rule-providers and reduce domain-set memory

rules/common/domain_keyword.go

@@ -1,7 +1,6 @@
 package common
 
 import (
-	"golang.org/x/net/idna"
 	"strings"
 
 	C "github.com/Dreamacro/clash/constant"
@@ -11,7 +10,6 @@ type DomainKeyword struct {
 	*Base
 	keyword string
 	adapter string
-	isIDNA  bool
 }
 
 func (dk *DomainKeyword) RuleType() C.RuleType {
@@ -28,20 +26,14 @@ func (dk *DomainKeyword) Adapter() string {
 }
 
 func (dk *DomainKeyword) Payload() string {
-	keyword := dk.keyword
-	if dk.isIDNA {
-		keyword, _ = idna.ToUnicode(keyword)
-	}
-	return keyword
+	return dk.keyword
 }
 
 func NewDomainKeyword(keyword string, adapter string) *DomainKeyword {
-	actualDomainKeyword, _ := idna.ToASCII(keyword)
 	return &DomainKeyword{
 		Base:    &Base{},
-		keyword: strings.ToLower(actualDomainKeyword),
+		keyword: strings.ToLower(keyword),
 		adapter: adapter,
-		isIDNA:  keyword != actualDomainKeyword,
 	}
 }