Fetches proxies from an HTTP API, caches them in memory, and appends
a random proxy to the chain on each connection. Supports proto/country
filters and configurable refresh interval.
Config: proxy_source.url, proto, country, limit, refresh
CLI: -S/--proxy-source URL
Asyncio-based SOCKS5 server that tunnels connections through
configurable chains of SOCKS5, SOCKS4/4a, and HTTP CONNECT proxies.
Tor integration via standard SOCKS5 hop.