FreeBSD-main-amd64-test - Build #24980 - Still Unstable

FreeBSD-main-amd64-test - Build #24980 (537bdafbc25d39b4bb3dce124691913f86c08288) - Still Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/24980/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/24980/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/24980/console

Status explanation:
"Unstable" - some tests are suspected being broken by the following changes
"Still Unstable" - the failing test cases have not been fixed by these
                   following changes and this is a notification to note that
                   these changes have not been fully tested by the CI system

Change summaries:
(Those commits are likely but not certainly responsible)

e08b44339b65a6aa7df4a58d0b1f471ba16da410 by kp:
if_ovpn tests: test large packets in IPv6 tunnel

88f557a2a9c31aaa954841b06d38eec84a1702fc by kp:
libpfctl: fix incorrect labels copy

af700f430fd86ba3eae63e587985a12436db8f69 by tuexen:
tcp: no data on SYN segments unless doing TFO

56b40c285b5994d64e7e8fba821c57f86e91502c by rscheff:
build: add -Wswitch to clang for more consistency with gcc

da2d6e2815d7694e3ccbd561508074c547b02dd6 by tuexen:
rtld: fix check for endianess of elf hints file

537bdafbc25d39b4bb3dce124691913f86c08288 by emaste:
rights.4: add note about rights not being simple bitmasks



The failed test cases:

3 tests failed.
FAILED:  sys.netinet6.ndp.ndp_del_gu_success

Error Message:
atf-check failed; see the output of the test for details

FAILED:  sys.fs.tmpfs.times_test.empty

Error Message:
Test case was expecting a failure but none were raised

FAILED:  cddl.usr.sbin.zfsd.zfsd_unittest.main

Error Message:
Received signal 6