disable nagle algorithm

disable nagle algorithm

Ago noticed that some Windows clients experience small packets
from the server being aggregated and set after a long delay
(200-300ms).

He found that TCP_NODELAY on the socket solved this, I tested it
and it didn't have any noticable bad effect, so I implemented it
for all sockets, client and server.

Thans Ago for debugging this and notifying the cause.

Reported-by: Ago Allikmaa <maxorator@gmail.com>
Signed-off-by: Andy Green <andy@warmcat.com>