torsocks could support ptrace sandboxing

pros:

cons:

kind of a pain to implement
DNS would require actual parsing, which is apparently a hard problem even for 'minimal' implementations: https://security.googleblog.com/2017/10/behind-masq-yet-more-dns-and-dhcp.html. I think an initial hybrid implementation could punt on this, and it would still fix the ugly hack of hardcoding SIP paths.