MFC r297790:
r297790 (by pfg):

libc: replace 0 with NULL for pointers.

While here also cleanup some surrounding code; particularly
drop some malloc() casts.

Found with devel/coccinelle.

MFC r289195:

Integrate the tests from lib/libarchive, usr.bin/cpio, and usr.bin/tar in to
the FreeBSD test suite

functional_test.sh was ported from bin/sh/tests/functional_test.sh, as a
small wrapper around libarchive_test, bsdcpio_test, and bsdtar_test provided
by upstream.

A handful of testcases in lib/libarchive/tests have been disabled as they
were failing when run with kyua test (see BROKEN_TESTS in
lib/libarchive/tests/Makefile)

As a sidenote: this removes the check/test targets from the Makefiles as they
don't match the pattern used in the rest of the FreeBSD test suite.

Sponsored by: EMC / Isilon Storage Division

Conflicts:
lib/libarchive/test
usr.bin/cpio/test

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

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

Make it possible to use permission sets (full_set, modify_set, read_set
and write_set) with setfacl(1).

PR: kern/154113
Submitted by: Shawn Webb <lattera at gmail dot com> (earlier version)
MFC after: 1 month

Fix c194955 - somehow I managed all the new files, tripling their
contents.

Add NFSv4 ACL support to libc.

This adds the following functions to the acl(3) API: acl_add_flag_np,
acl_clear_flags_np, acl_create_entry_np, acl_delete_entry_np,
acl_delete_flag_np, acl_get_extended_np, acl_get_flag_np, acl_get_flagset_np,
acl_set_extended_np, acl_set_flagset_np, acl_to_text_np, acl_is_trivial_np,
acl_strip_np, acl_get_brand_np. Most of them are similar to what Darwin
does. There are no backward-incompatible changes.

Approved by: rwatson@