util/socketpair_ersatz test requires configured network
When I use unshare -r -n ./src/test/test
to try to reproduce #30409 (moved), I get this error:
util/socketpair_ersatz: [forking]
FAIL src/test/test_util.c:5402: assert(0 OP_EQ socketpair_result): 0 vs -101
[socketpair_ersatz FAILED]