retest test_unixsock fails, bind(): Operation not permitted

[jimmbelll]

I see this failure with re-3.7.0 on debian bookworm.
# ./build/test/retest -rv
# sudo ./build/test/retest -rv

test 170 -- test_unixsock
unixsock: bind(): Operation not permitted [1] (http_njkjeqTj8Mzg1pPssEbxcWHcSR3WbNa.sock:0)

unixsock: TEST_ERR: .../re-3.7.0/test/unixsock.c:49: (Operation not permitted [1])
test: test_unixsock: test failed (Operation not permitted [1])

retest: TEST_ERR: .../re-3.7.0/test/main.c:238: (Operation not permitted [1])