arpsend: proper fix for VLAN interfaces

ip command lists VLAN interfaces in form of ethX.Y@ethX, but arpsend
(and other utilities) expects only ethX.Y so remove the part of VLAN
interface name starting from @.

The previous fix (commit 4db38b551a44019a4fced9abf23bd6e1531cef60) was
wrong -- we do not need to exclude VLAN interfaces, we need to process those
properly.

http://bugzilla.openvz.org/show_bug.cgi?id=617
1 file changed