Fix typo "Syetem" -> "System"

https://github.com/XTLS/Xray-core/issues/6564#issuecomment-5150960771

Closes https://github.com/XTLS/Xray-core/issues/6564

infra/conf/transport_sockopt.go

@@ -10,7 +10,7 @@ import (
 )
 
 type CustomSockoptConfig struct {
-	Syetem  string `json:"system"`
+	System  string `json:"system"`
 	Network string `json:"network"`
 	Level   string `json:"level"`
 	Opt     string `json:"opt"`
@@ -124,7 +124,7 @@ func (c *SocketConfig) Build() (*internet.SocketConfig, error) {
 
 	for _, copt := range c.CustomSockopt {
 		customSockopt := &internet.CustomSockopt{
-			System:  copt.Syetem,
+			System:  copt.System,
 			Network: copt.Network,
 			Level:   copt.Level,
 			Opt:     copt.Opt,

transport/internet/sockopt_linux.go

@@ -169,6 +169,8 @@ func applyInboundSocketOptions(network string, fd uintptr, config *SocketConfig)
 				return errors.New("failed to set TCP_MAXSEG", err)
 			}
 		}
+	}
+
 	if len(config.CustomSockopt) > 0 {
 		for _, custom := range config.CustomSockopt {
 			if custom.System != "" && custom.System != runtime.GOOS {
@@ -206,7 +208,6 @@ func applyInboundSocketOptions(network string, fd uintptr, config *SocketConfig)
 			}
 		}
 	}
-	}
 
 	if config.Tproxy.IsEnabled() {
 		if err := syscall.SetsockoptInt(int(fd), syscall.SOL_IP, syscall.IP_TRANSPARENT, 1); err != nil {