Fix "cfe-" string length copy.
Check if there's an extra byte a.b.c-d.e / a.b.c-d.e-f.
Add support for Huawei CFE versions ("cfe-vd").

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Patchwork: http://patchwork.openwrt.org/patch/3766/


Signed-off-by: Jonas Gorski <jogo@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@37101 3c298f89-4303-0410-b956-a3cf2f4a3e73