RPCINFO on macOS behaves different compared to other linux clients and
doesn't provide request address in rpcb structure of the
RPCBPROC_GETADDRLIST call which doesn't seem to be forbidden.

In this case RPCBIND uses RPC call's source address and picks a
closest corresponding local address. If there are no addresses in the
same subnet as the source address, return of RPCBIND may vary
depending on the order of addresses returned in getifaddrs. If a link
local precedes global address it may be returned even if the request
comes from neither a link local nor from link local in a different
scope, which will prevent services like nfs from working in tpc6
scenario on macOS clients. Issue can be seen only on FreeBSD rpcbind
port due to changes in workflow of addrmerge call.

Submitted by:	Dmitry Ovsyannikov (Dmitry.Ovsyannikov@dell.com)
Sponsored by:	Dell EMC

(cherry picked from commit d18c9a91979543adc182c7b28819691b64fda388)

Sponsored by:	Dell EMC Isilon

This simplifies make logic/output

MFC after:	1 month
Sponsored by:	Dell EMC Isilon

usr.sbin/rpcbind/tests/addrmerge_test.c
	Fix some sizeof calculations that work only by luck on 64-bit
	platforms.

PR:		210314
Reviewed by:	ngie
Approved by:	re (kib)
Reported by:	Mark Millard
MFC after:	4 weeks
Sponsored by:	Spectra Logic Corp
Differential Revision:	https://reviews.freebsd.org/D6855

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

Sponsored by:	The FreeBSD Foundation

Sponsored by:	EMC / Isilon Storage Division

Sponsored by:	The FreeBSD Foundation

rpcbind/check_bound.c
	Fix CID1347798, a memory leak in mergeaddr.

rpcbind/tests/addrmerge_test.c
	Fix CID1347800 through CID1347803, memory leaks in ATF tests.  They
	are harmless because each ATF test case runs in its own process, but
	they are trivial to fix.  Fix a few other leaks that Coverity didn't
	detect, too.

Coverity CID:	1347798, 1347800, 1347801, 1347802, 1347803
MFC after:	2 weeks
X-MFC-With:	293229
Sponsored by:	Spectra Logic Corp