tftp: more helpful help text
It took me a while to figure out syntax of tftp command, document that
server address is taken from environment.

Signed-off-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
1 parent d985d22 commit 54533366d154b1273620decbf8cdb5e39b95e8f8
@Pavel Machek Pavel Machek authored on 21 Jul 2014
Sascha Hauer committed on 22 Jul 2014
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commands/tftp.c