FreeBSD-main-amd64-test - Build #27799 - Still Unstable

FreeBSD-main-amd64-test - Build #27799 (404753664a5e145d98f1749d1c7bc046c8aa32c3) - Still Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/27799/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/27799/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/27799/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)

387ae6390534b6e9b48931840e7bc76eeb0b258d by des:
libc: Clean up *dir() code

5074d5c9845e142883cdbb9ad212be66e57615d0 by des:
libc: Improve POSIX conformance of dirfd()

4d73b07d02d12cdff0558d3ca6c4b3224cae831f by bapt:
diff: fix support for -l with new diff algorithm

0ec58e7c2e533a15eabfe8dca4a14e9ae93de4b5 by bapt:
diff: use pdwait(2) instead of homemade one

c479817f30b2d2500c9663a1a07c74ba19321416 by bapt:
diff: remove useless include as kevent is not used anymore

404753664a5e145d98f1749d1c7bc046c8aa32c3 by bapt:
diff3: use pdwait instead of homemade one



The failed test cases:

3 tests failed.
FAILED:  sys.netpfil.pf.nat.endpoint_independent_compat

Error Message:
server1 did not receive connection from client (default)

FAILED:  sys.netgraph.ksocket.udp6_bind

Error Message:
/usr/src/tests/sys/netgraph/ksocket.c:167: connect(us, (struct sockaddr *)rep->data, sizeof(struct sockaddr_in6)) == 0 not met

FAILED:  sys.netgraph.ksocket.udp6_connect

Error Message:
/usr/src/tests/sys/netgraph/ksocket.c:134: NgSendMsg(cs, ".:" OURHOOK, NGM_KSOCKET_COOKIE, NGM_KSOCKET_CONNECT, &sin6, sizeof(sin6)) >= 0 not met