Add encrypt subscription ON/OFF switch

Co-Authored-By: SudoSpace <79229394+sudospaes@users.noreply.github.com>

web/service/setting.go

@@ -51,6 +51,7 @@ var defaultValueMap = map[string]string{
 	"subCertFile":        "",
 	"subKeyFile":         "",
 	"subUpdates":         "12",
+	"subEncrypt":         "true",
 	"subShowInfo":        "true",
 }
 
@@ -397,6 +398,10 @@ func (s *SettingService) GetSubUpdates() (int, error) {
 	return s.getInt("subUpdates")
 }
 
+func (s *SettingService) GetSubEncrypt() (bool, error) {
+	return s.getBool("subEncrypt")
+}
+
 func (s *SettingService) GetSubShowInfo() (bool, error) {
 	return s.getBool("subShowInfo")
 }