Feature: add TCP TPROXY support (#1049)

proxy/redir/udp_other.go

@@ -7,10 +7,6 @@ import (
 	"net"
 )
 
-func setsockopt(c *net.UDPConn, addr string) error {
-	return errors.New("UDP redir not supported on current platform")
-}
-
 func getOrigDst(oob []byte, oobn int) (*net.UDPAddr, error) {
 	return nil, errors.New("UDP redir not supported on current platform")
 }