In legacy/trac#32637, we made clients default to "PreferIPv6" on SOCKSPorts (and other client ports). But in legacy/trac#33796, we discovered that this change broke torsocks. We want to defer this change to 0.4.4, so tor can implement IPv4-only and IPv6-only resolves for torsocks. Since legacy/trac#32637, we have also merged: * legacy/trac#33608, which removes a forced PreferIPv6 for non-SOCKSPorts * legacy/trac#32994, which puts the PreferIPv6 default in port_parse_config(), rather than in 2 different places in the code So it should be very easy to change the default for PreferIPv6.