[PATCH] WEP fields are incorrectly shown to be INSIDE snap in the doc

>If encryption is enabled, each fragment payload size is reduced by enough space
>to add the prefix and postfix (IV and ICV totalling 8 bytes in the case of WEP)
>So if you have 1500 bytes of payload with ieee->fts set to 500 without
>encryption it will take 3 frames.  With WEP it will take 4 frames as the
>payload of each frame is reduced to 492 bytes.

Text is correct, but in picture (IV,payload,ICV) sits inside SNAP.
Patch corrects this.

Signed-Off-By: Denis Vlasenko <vda@ilport.com.ua>
Acked-By: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>