Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

A netgraph node that can do different manipulations with
mbuf_tags(9) on packets.

Submitted by: Vadim Goncharov <vadimnuclight tpu.ru>
mdoc(7) reviewed by: ru