474 tcp_strong_iss should be 2 instead of 1
Reviewed by: Sebastien Roy <sebastien.roy@delphix.com>
Reviewed by: Saso Kiselkov <skiselkov.ml@gmail.com>
Reviewed by: Garrett D'Amore <garrett@damore.org>
Approved by: Robert Mustacchi <rm@joyent.com>