FreeBSD-main-amd64-test - Build #24278 - Still Unstable

FreeBSD-main-amd64-test - Build #24278 (767c97c501ae72eb3d74bc23ddf5a1d570d8f841) - Still Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/24278/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/24278/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/24278/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)

767c97c501ae72eb3d74bc23ddf5a1d570d8f841 by kevans:
install: handle -m +X more accurately



The failed test cases:

4 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.netpfil.common.dummynet.pf_queue

Error Message:
We failed prioritisation 1 times

FAILED:  sys.netinet6.frag6.frag6_19.frag6_19

Error Message:
Global IPv6 statistics do not match: 19 != 20

FAILED:  sys.fs.tmpfs.times_test.empty

Error Message:
Incorrect atime