to force the allocation of MAC labels for all mbufs regardless of
whether a configured policy requires labeling when the mbuf is
allocated. This can be useful it you anticipate loading a fully
labeled policy after boot and don't want mbufs to exist without
label storage, for performance measurement purposes, etc. It also
slightly lowers the overhead of m_tag labeling due to removing the
decision logic.
While here, improve commenting of other MAC options.
Obtained from: TrustedBSD Project
Sponsored by: DARPA, Network Associates Laboratories
e965edfda2