MFC r316503,r316504,r316505:

Approved by: re (gjb)

r316503:

Clean up trailing whitespace

r316504:

Clean up more trailing whitespace in the licensing tort that
happened to be spaces, not tabs

r316505:

Don't assume NAME_MAX is 255

Query the filesystem limit via getconf(3) instead

MFC r305148:

DIRDEPS_BUILD: Add some missing dirctories to the build.

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

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

Fix usr.sbin/extattr testcases on tmpfs

Skip the usr.sbin/extattr testscases if $TMPDIR is tmpfs, which doesn't
support extended attributes

PR: 210184
Reported by: ngie
Reviewed by: ngie
Approved by: re (glebius)
MFC after: 4 weeks
Differential Revision: https://reviews.freebsd.org/D6802
Sponsored by: Spectra Logic Corp

Merge ^/user/ngie/release-pkg-fix-tests to unbreak how test files are installed
after r298107

Summary of changes:

- Replace all instances of FILES/TESTS with ${PACKAGE}FILES. This ensures that
namespacing is kept with FILES appropriately, and that this shouldn't need
to be repeated if the namespace changes -- only the definition of PACKAGE
needs to be changed
- Allow PACKAGE to be overridden by callers instead of forcing it to always be
`tests`. In the event we get to the point where things can be split up
enough in the base system, it would make more sense to group the tests
with the blocks they're a part of, e.g. byacc with byacc-tests, etc
- Remove PACKAGE definitions where possible, i.e. where FILES wasn't used
previously.
- Remove unnecessary TESTSPACKAGE definitions; this has been elided into
bsd.tests.mk
- Remove unnecessary BINDIRs used previously with ${PACKAGE}FILES;
${PACKAGE}FILESDIR is now automatically defined in bsd.test.mk.
- Fix installation of files under data/ subdirectories in lib/libc/tests/hash
and lib/libc/tests/net/getaddrinfo
- Remove unnecessary .include <bsd.own.mk>s (some opportunistic cleanup)

Document the proposed changes in share/examples/tests/tests/... via examples
so it's clear that ${PACKAGES}FILES is the suggested way forward in terms of
replacing FILES. share/mk/bsd.README didn't seem like the appropriate method
of communicating that info.

MFC after: never probably
X-MFC with: r298107
PR: 209114
Relnotes: yes
Tested with: buildworld, installworld, checkworld; buildworld, packageworld
Sponsored by: EMC / Isilon Storage Division

Fix "getextattr -x" with non-ascii attribute values

extattr/rmextattr.c
When printing hex output, treat all attribute values as unsigned
char arrays instead of sign extending them to 32 bit values.

extattr/tests/extattr_test.sh
Add a regression test

PR: 209039
MFC after: 4 weeks
Sponsored by: Spectra Logic Corp

Allow setextattr(8) to take attribute values from stdin

Add the -i option to setextattr. This option allow extended attribute data
to be provided via stdin. Add a -qq option to getextattr, which omits the
trailing newline. Together these options can be used to work with extended
attributes whose values are large and/or binary.

usr.sbin/extattr/Makefile:
Link against libsbuf which is used for processing stdin data.

usr.sbin/extattr/rmextattr.8:
Document setextattr's -i option, getextattr's -qq option, and remove
the BUG about setextattr only being useful for strings.

usr.sbin/extattr/rmextattr.c:
For setextattr operations, buffer attribute data in an sbuf. If -i
is specified, pull the data from stdin, otherwise from the
appropriate argurment.

Update usage text and argument validation code for setextattr's -i
option.

usr.sbin/extattr/tests/extattr_test.sh
Add tests for -q and -i.

Reviewed by: wblock (manpage)
MFC after: 4 weeks
Sponsored by: Spectra Logic Corp
Differential Revision: https://reviews.freebsd.org/D6090

Add PACKAGE fields to usr.sbin/extattr/tests/Makefile

usr.sbin/extattr/tests/Makefile
Add boiler plate required by 298107 but omitted by 298483. These
two changes passed through CR in parallel. I think this should get
the full test suite running in Jenkins again.

MFC after: 22 days
X-MFC-with: 298483
Sponsored by: Spectra Logic Corp

Add ATF tests for usr.sbin/extattr

Add ATF tests for the existing behavior of setextattr, rmextattr, lsextattr,
and getextattr.

Reviewed by: ngie
MFC after: 4 weeks
Sponsored by: Spectra Logic Corp
Differential Revision: https://reviews.freebsd.org/D5889