Remove expected failure from lib.libc.sys.t_mincore:mincore_resid

The failure was added based on observation seen on 11.0-CURRENT @ r273153, not
based on internal testing at EMC/Isilon

PR: 194829
Tested with the following configuration:
- amd64/i386
- 11.0-CURRENT @ r273153
- 100 times in a tight loop as root with the following commands...
-- kyua test lib/libc
-- kyua test lib/libc/sys
-- kyua test lib/libc/sys/mincore_test
Expect lib.libc.sys.getcontext_test.setcontext_link to fail on amd64; add
additional debugging to make the underlying problem more visible

Calling setcontext(2) on amd64 as shown in the test program is failing on
amd64, not i386, with a return code of -1 and an errno of EINVAL

Further investigation is being done in the PR to determine the root cause for
the failure

PR: 194828
Tested with the following configuration:
- amd64/i386
- 11.0-CURRENT @ r273153
- 100 times in a tight loop as root with the following commands...
-- kyua test lib/libc
-- kyua test lib/libc/sys
-- kyua test lib/libc/sys/getcontext_test
Fix code-typo; introduced by r267511

MFC after:	3 days
X-MFC-to:	stable/10
Staticize the test plans.
Balance DPADD against LDADD for dpv(1,3).

Thanks to:	ngie
MFC after:	21 days
X-MFC-to:	stable/10 stable/9
X-MFC-with:	274116 274120 274121 274123 274144
fsirand does not actually use libutil
Create a directory for the PAM tests.
Convert to use libxo.

Obtained from:  Phil Shafer <phil@juniper.net>
Sponsored by:   Juniper Networks, Inc.
Document that w(1) supports libxo(3).
Add to CTL support for logical block provisioning threshold notifications.

For ZVOL-backed LUNs this allows to inform initiators if storage's used or
available spaces get above/below the configured thresholds.

MFC after:	2 weeks
Sponsored by:	iXsystems, Inc.
Upon second-thought (following r274144), remove spurious (unused)
line-noise (libdialog never lived in lib/ -- but rather the noise
came from translating a comment that was introduced 16 years ago
via r40306; translation from comment to code occurred via r267511).

MFC after:	3 days
Reviewed by:	ngie
X-MFC-to:	stable/10
Bump __FreeBSD_version after SA-14:23, SA-14:24,
SA-14:25.

Approved by:	re (implicit)
Sponsored by:	The FreeBSD Foundation
Add include missed in r274154, breaking the buildworld.
remove comment about the bug... I don't remeber what it was...
It may be an issue w/ using awk which is in /usr (and isn't always
present), or another issue...

Suggestion by:	brooks
filedesc: just free old tables without altering the list which is freed anyway

No functional changes.
filedesc: avoid taking fdesc_mtx when not necessary in fddrop

No functional changes.
Add sysctl kern.proc.cwd

It returns only current working directory of given process which saves a lot of
overhead over kern.proc.filedesc if given proc has a lot of open fds.

Submitted by:	Tiwei Bie <btw mail.ustc.edu.cn> (slightly modified)
X-Additional:	JuniorJobs project
rpcbind does not need to be linked to libutil
sntp does not depend on libm
iscsid does not need to link to libssl