Adapt new shadowsocks library.

1. Modify ss/ssu handler and connector
2. Add users to metadata of ss and ssu handler

go.mod

@@ -10,6 +10,7 @@ require (
 	github.com/gin-contrib/cors v1.7.2
 	github.com/gin-gonic/gin v1.10.1
 	github.com/go-gost/core v0.3.3
+	github.com/go-gost/go-shadowsocks2 v0.1.0
 	github.com/go-gost/gosocks4 v0.0.1
 	github.com/go-gost/gosocks5 v0.4.2
 	github.com/go-gost/plugin v0.2.1
@@ -30,7 +31,7 @@ require (
 	github.com/quic-go/quic-go v0.54.1
 	github.com/quic-go/webtransport-go v0.9.0
 	github.com/rs/xid v1.3.0
-	github.com/shadowsocks/go-shadowsocks2 v0.1.6-0.20241020092332-e1fe9ea73740
+	github.com/shadowsocks/go-shadowsocks2 v0.1.5
 	github.com/sirupsen/logrus v1.9.3
 	github.com/songgao/water v0.0.0-20200317203138-2b4b6d7c09d8
 	github.com/spf13/viper v1.19.0
@@ -116,6 +117,7 @@ require (
 	github.com/tjfoc/gmsm v1.4.1 // indirect
 	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
 	github.com/ugorji/go/codec v1.2.12 // indirect
+	github.com/zeebo/blake3 v0.2.4 // indirect
 	go.uber.org/mock v0.5.0 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
 	golang.org/x/arch v0.8.0 // indirect