Tor master breaks bridge clients
When I run 'make test-network-all' on master (0.3.0-alpha-dev), both bridge tests are broken, apparently because the bridge client crashes:
$ make test-network-all
$CHUTNEY_PATH was not set.
Assuming test-network.sh will find ./../chutney
mkdir -p ./test_network_log
ping6 ::1 succeeded, running IPv6 flavors: bridges+ipv6-min ipv6-exit-min hs-ipv6 single-onion-ipv6.
tor-stable not found, skipping mixed flavors: mixed.
SKIP: mixed
PASS: basic-min
FAIL: bridges-min
PASS: hs-min
PASS: single-onion
FAIL: bridges+ipv6-min
PASS: ipv6-exit-min
PASS: hs-ipv6
PASS: single-onion-ipv6
Log and result files are available in ./test_network_log.
make: *** [test-network-all] Error 1
This is consistent across Linux 64-bit, macOS 64-bit, and macOS 32-bit. 0.2.8.9 and 0.2.9.4-alpha work fine, so it's probably #20389 (moved) or #20077 (moved) or #19858 (moved) or #13827 (moved) or #6769 (moved).