Detection of interface type by filter must happen before detection of
interface type by prefix. Else the following sequence of commands will
try to create a LAGG interface instead of a VLAN interface, which
accidentially worked previously, because the date pointed to by the
ifr_data pointer was not parsed by VLAN create ioctl(2). This is a
regression after r368229, because the VLAN creation now parses the
ifr_data field.
How to reproduce:
# ifconfig lagg0 create
# ifconfig lagg0.256 create
Differential Revision: https://reviews.freebsd.org/D27521
Reviewed by: kib@ and kevans@
Reported by: raul.munoz@custos.es
Sponsored by: Mellanox Technologies // NVIDIA Networking
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