FreeBSD-main-amd64-test - Build #25372 - Still Unstable

FreeBSD-main-amd64-test - Build #25372 (a2b67d4a6e364586ae7180cc4696609e8960f955) - Still Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/25372/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/25372/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/25372/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)

4113ea3403fc6abc5e3c51eb027ccef714c89270 by dougm:
vm_object: speed up page collect flush

4a06d149371c16287e1dd5a8fa51e92346a0c3f4 by emaste:
depend-cleanup: remove entries from 2020 and 2021

9082398090bcf0ac333397d47e594b105ea3aefd by fuz:
lib/libc/amd64/string: fix overread condition in memccpy

a2b67d4a6e364586ae7180cc4696609e8960f955 by sjg:
Update dirdeps.mk to latest



The failed test cases:

4 tests failed.
FAILED:  libexec.tftpd.functional.wrq_dropped_data_v4

Error Message:
Test case body timed out

FAILED:  libexec.tftpd.functional.wrq_medium_window_v6

Error Message:
Test case body timed out

FAILED:  sys.netinet6.test_ip6_output.py.TestIP6Output::test_output6_nhop

Error Message:
/usr/tests/sys/netinet6/test_ip6_output.py:142: AssertionError

FAILED:  sys.netinet6.test_ip6_output.py.TestIP6OutputNhopLL::test_output6_nhop_linklocal

Error Message:
/usr/tests/sys/netinet6/test_ip6_output.py:296: AssertionError