The RSS ioctls had no consumer in the tree.
Report the key, hash types and indirection table under -v, and add two
verbs. rsstable takes a comma separated list of queue numbers and
first-last ranges distributed round-robin over the table, or default for
every queue; naming one queue sends every flow to it. rsskey takes an
even number of hex digits.
The status hook stays silent when the interface does not answer, so
drivers without the methods and kernels predating the ioctls print
nothing.
The key prints under -v rather than -k because SIOCGIFRSSKEY takes no
privilege check, so gating the display would imply an access control
that does not exist.
Signed-off-by: Nick Price <nprice@FreeBSD.org>