[3/3] queue(3): Upstream some new macros

[cem]

Summary

Add the queue(3) macros LIST_MOVE, TAILQ_MOVE, STAILQ_SPLICE,
TAILQ_SPLICE, and SLIST_REMOVE_PREVPTR, and document them in queue.3.

Test Plan

Bryan may have a follow-up patch to add queue debugging in more places, e.g.
filemon(4).

See also https://reviews.freebsd.org/D3983 and https://reviews.freebsd.org/D3984 .

[cem]

Split out https://reviews.freebsd.org/D3983 and https://reviews.freebsd.org/D3984 .

[cem]

Ping :-). Trying to close out old reviews one way or another.

[wblock]

Man page changes look okay. Please check with igor and mandoc -Tlint before commit. Thanks!

[cem]

We don't even use these macros at Isilon, actually. I'll drop this changeset. The splice routines seem plausibly useful for list manipulations but I can't imagine an actual use for them.