neigh: support bridge entries for vxlan interfaces
neigh: support bridge entries for vxlan interfaces

bridge entries used for switching into vxlan interfaces do not include a
vlan. A comparison of such entires currently always fails which leads
to an invalid cache. This patch selectively adds the NEIGH_ATTR_VLAN
flag based on the passed entry.

https://github.com/thom311/libnl/pull/182

greearb/libnl-ct,greearb/libnl-ct,greearb/libnl-ct,thom311/libnl,thom311/libnl,thom311/libnl