make openid support default false for compitable with v1.1 (#1650)

modules/setting/setting.go

@@ -995,8 +995,8 @@ func newService() {
 	Service.NoReplyAddress = sec.Key("NO_REPLY_ADDRESS").MustString("noreply.example.org")
 
 	sec = Cfg.Section("openid")
-	Service.EnableOpenIDSignIn = sec.Key("ENABLE_OPENID_SIGNIN").MustBool(true)
-	Service.EnableOpenIDSignUp = sec.Key("ENABLE_OPENID_SIGNUP").MustBool(!Service.DisableRegistration)
+	Service.EnableOpenIDSignIn = sec.Key("ENABLE_OPENID_SIGNIN").MustBool(false)
+	Service.EnableOpenIDSignUp = sec.Key("ENABLE_OPENID_SIGNUP").MustBool(!Service.DisableRegistration && Service.EnableOpenIDSignIn)
 	pats := sec.Key("WHITELISTED_URIS").Strings(" ")
 	if len(pats) != 0 {
 		Service.OpenIDWhitelist = make([]*regexp.Regexp, len(pats))