DF-3227 fix validation run 1 (module built with fix.diff, fuse.ko replaced, rebooted)
(captured via follow-up ssh: the launching session hit its own timeout while the
child drained its 35s-per-op fuse_ipc_wait timeouts — daemon self-DoS, unchanged
by the fix and irrelevant to it)

kldload fuse -> already loaded from patched /boot/kernel/fuse.ko at boot
mode 0 run on the PATCHED module:

	[867] child: statfs[38..46] rc=0            <- normal path healthy
	[866] blind u41 ok (freed-while-linked #41) <- replies still accepted
	[866] read: got request unique=41 op=17 len=40   <- live requests delivered
	[866] read: timed out (queue empty?)             <- healthy empty-queue read
	[866] == mode0 summary: blind_ok=41 enomsg=0 eproto=0 SIG1_zero_byte_reads=0 SIG2_dup_uniques=0 ==

=> SIG1=0 (baseline: 6-7). teardown: umount -f -> umount-rc=0, no panic, guest up.

(second, independent validation on the final module build — with DF-3228's v2
fix also applied — in fix_run2.log: identical result)