FreeBSD-main-amd64-test - Build #23705 - Still Unstable

FreeBSD-main-amd64-test - Build #23705 (17dce737e305891c88e2410469cd23d8cfad1ca3) - Still Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/23705/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/23705/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/23705/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)

af9ce4e9bb7d717279e02d46455e85ef6fb828f7 by cy:
kern_ntptime: Fix undefined behavior of the shift operator

8e7c2e14cffaa33f1f1413f8a3e462611217b8e8 by rscheff:
netstat: display c and C flags properly

2e07e885d65973f13d6111f7e0fcfb848a68082e by bz:
LinuxKPI: implement timer_{delete,shutdown}_sync()

553022aba541d68d83fefd8e516434e1ce6d356e by jhb:
ipf: Remove no-longer-needed NO_WARRAY_BOUNDS.

17dce737e305891c88e2410469cd23d8cfad1ca3 by imp:
mvs: Eliminate unused variable.



The failed test cases:

5 tests failed.
FAILED:  sys.netpfil.common.dummynet.pf_queue

Error Message:
We failed prioritisation 1 times

FAILED:  sys.net.if_ovpn.if_ovpn.ra

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

FAILED:  sys.netinet6.frag6.frag6_19.frag6_19

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

FAILED:  sys.netlink.test_rtnl_ifaddr.py.TestRtNlAddIfaddrLo::test_add_6[gu_host]

Error Message:
/usr/tests/sys/netlink/test_rtnl_ifaddr.py:702: AssertionError

FAILED:  sys.netlink.test_rtnl_ifaddr.py.TestRtNlAddIfaddrLo::test_add_6[gu_prefix]

Error Message:
/usr/tests/sys/netlink/test_rtnl_ifaddr.py:702: AssertionError