splice from one fd to another

Signed-off-by: Pavel Tikhomirov <ptikhomirov@parallels.com>
server: accept tcp connection

Signed-off-by: Pavel Tikhomirov <ptikhomirov@parallels.com>
client: connect to server and send file

Signed-off-by: Pavel Tikhomirov <ptikhomirov@parallels.com>
Makefile

Signed-off-by: Pavel Tikhomirov <ptikhomirov@parallels.com>