RedBoot tcp hack

[Mark Salter]

>>>>> Gary Thomas writes:

+	* src/net/tcp.c (tcp_send): Add [restore] delay into TCP write
+	path.  Sadly, there seems to be some issue where some ACK packets
+	get lost unless this is present (at least on some hardware).  
+	n.b. a small delay here is definitely preferable to the horrendous
+	delays imposed by TCP retries if this condition occurs.

We can't leave this in. It creates a 2ms overhead for every transmitted
tcp segment. The actual problem and a proper fix needs to be found. I've
never seen anything like described above. Could you elaborate on how to
reproduce, etc.

--Mark