Nothing in iconv(1) uses symbols from libcrypt
id(1) only uses getaudit(2) from the BSM which is part of the libc
ftp(1) uses nothing from libutil, do not link to it
Hook up OpenPAM's own unit tests to the build.
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
Merge remote-tracking branch 'freebsd/master' into hardened/current/master