net/dhcpcd-ui: Remove stale MASTER_SITE

[driesm]

Summary

Commit message:

net/dhcpcd-ui: Remove stale MASTER_SITE

 Approved by: tbd (mentor)
 Differential Revision: https://reviews.freebsd.org/D32908

Test Plan

Poudriere testport looks good

[0mp]

Looks good to me.

net/dhcpcd-ui/Makefile

after_sack_rexmit:
          *  - When the socket is in the CLOSED state (RST is being sent)
          */
         if ((tp->t_flags & TF_FASTOPEN) &&
             (((flags & TH_SYN) && (tp->t_rxtshift > 0)) ||
              ((tp->t_state == TCPS_SYN_SENT) &&
               (tp->t_tfo_client_cookie_len == 0)) ||
              (flags & TH_RST)))
                 len = 0;
+
+        /* Without fast-open there should never be data sent on a SYN. */
+        if ((flags & TH_SYN) && !(tp->t_flags & TF_FASTOPEN)) {
+                len = 0;
+        }
+
         if (len <= 0) {
                 /*
                  * If FIN has been sent but not acked,
                  * but we haven't been called to retransmit,
                  * len will be < 0.  Otherwise, window shrank
                  * after we sent into it.  If window shrank to 0,
                  * cancel pending retransmit, pull snd_nxt back
                  * to (closed) window, and set the persist timer