v2.3.0

Feature

• add http:// proxy support with CONNECT method
• add socks4:// proxy support (UDP unsupported)
• add reject:// proxy support which would block all connections

Change

• update gVisor module to v0.0.0-20210716193733-566c23a60eea
• update wireguard-go module to v0.0.0-20210624150102-15b24b6179e0
• update other minor modules
• various improvement and bugfixes