feat: Add support for SO_REUSEPORT_LB option as per freeBSD

control_unix.go

@@ -8,13 +8,20 @@ import (
 	"golang.org/x/sys/unix"
 )
 
+// This value has been taken from https://reviews.freebsd.org/D11003 since this is not yet provided in golang.
+const FREEBSD_SO_REUSEPORT_LB = 0x00010000
+
 func Control(network, address string, c syscall.RawConn) (err error) {
 	controlErr := c.Control(func(fd uintptr) {
 		err = unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_REUSEADDR, 1)
 		if err != nil {
 			return
 		}
 		err = unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_REUSEPORT, 1)
+		if err != nil {
+			return
+		}
+		err = unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, FREEBSD_SO_REUSEPORT_LB, 1)
 	})
 	if controlErr != nil {
 		err = controlErr