python_examples/getifaddrs_ctypes: increase sll_halen to support IP6IP6 tunnel interfaces
python_examples/getifaddrs_ctypes: increase sll_halen to support IP6IP6 tunnel interfaces

Such interface:

* are named like "ip6tnl0" with old udev rules,
* have sll_hatype = ARPHRD_TUNNEL6
* are presented "link/tunnel6" by "ip addr"

fishilico/shared,fishilico/shared,fishilico/shared,fishilico/shared,fishilico/shared,fishilico/shared,fishilico/shared