- Copy stable/10@285827 to releng/10.2 in preparation for 10.2-RC1
builds.
- Update newvers.sh to reflect RC1.
- Update __FreeBSD_version to reflect 10.2.
- Update default pkg(8) configuration to use the quarterly branch.[1]

Discussed with: re, portmgr [1]
Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

MFC various fixes to the tools/regression/ tests.

- r262953 Fix m4 tests so that they run cleanly with prove.
- r262954 Fix printf tests so that they run cleanly with prove.
- r262959 Fix sed tests so that they run cleanly with prove.
- r262960 Fix yacc tests so that they run cleanly with prove.
- r262961 Fix pkill tests so that they run cleanly with prove.
- r262962 Fix ncal tests so that they run cleanly with prove.
- r263081 Fix lastcomm tests under amd64.
- r263082 Only run the make tests when make is fmake.
- r263083 Fix sa tests.
- r263084 Turn a test precondition into a skip in the mdconfig tests.
- r263085 Make the strerror tests work without libtap.
- r263087 Remove broken tests for eui64_line.
- r263221 Change etcupdate tests to return 1 on test failures.
- r263352 Make the priv test program exit with non-zero if any failures are detected.
- r263353 errx prepends the program name to the message; don't do it by hand.
- r263362 Include strings.h so that bpf_filter.c can be built in userland.

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

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

Tests for wcscasecmp(), wcsnlen(), and stpncpy().

Add to CFLAGS, rather than overriding it. Use LDFLAGS for the -L option,
and LDLIBS to specify -ltap.

Submitted by: ru

Link against libtap (ports/devel/libtap). Replace the calls to assert()
with calls to libtap::ok1(), and make sure the correct number of tests is
planned for, and that the exit code is correct.

Add regression test for strerror()/strerror_r().

Based on: src/lib/libc/string/strerror.c (rev 1.8)