Constant DEFAULT_BIND_ADDR 

pub const DEFAULT_BIND_ADDR: &'static str;

Default address bhtune-server binds to when nothing else specifies one – loopback only, so the server is not exposed to the network unless explicitly configured. Lives alongside DEFAULT_BRIDGE_HOST in this shared config module (rather than in bhtune-server itself) even though only the server binary ever calls [resolve_bind_addr], the same way templates/log below are settings only some commands consume – one bhtune.toml file and one precedence chain for every bhtune setting, CLI or server.