FreeBSD-main-amd64-test - Build #25558 - Still Unstable

FreeBSD-main-amd64-test - Build #25558 (d2c2d5f4945a2bf5b03494fb292c9c6a6099241d) - Still Unstable

Build information: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/25558/
Full change log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/25558/changes
Full build log: https://ci.FreeBSD.org/job/FreeBSD-main-amd64-test/25558/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)

cf73401c4f7af063c91a0c8e4d5b46e08f06db87 by des:
diff3: Fix merge mode.

d2c2d5f4945a2bf5b03494fb292c9c6a6099241d by des:
stdio: Disable USE_XPRINTF envar.



The failed test cases:

3 tests failed.
FAILED:  bin.pkill.pkill-j_test.main

Error Message:
1 of 4 tests failed

FAILED:  libexec.tftpd.functional.rrq_duped_ack_v6

Error Message:
Test case body timed out

FAILED:  sys.net.routing.test_rtsock_l3.rtm_add_v6_temporal1_success

Error Message:
/usr/src/tests/sys/net/routing/rtsock_common.h:684: rtsock read timed out (5 seconds passed)