- Replace deprecated dns.servers[] with new format (type + server + server_port)
- Add _make_dns_server() to parse udp://, tls://, https:// and bare IP addresses
- Drop ENABLE_DEPRECATED_* environment variable shims — fully v1.14-ready
- Fix transport block: omit for plain TCP (sing-box default), add httpupgrade support
- Add dns.final fallback and route.default_domain_resolver
- Config file renamed to hidden /tmp/.sub2socks.json (matches README)
- Include test_proxy.py live proxy CONNECT test suite
