refactor(client): breakout connect_to future into separate function

src/common/mod.rs

@@ -9,5 +9,5 @@ mod never;
 
 pub(crate) use self::buf::StaticBuf;
 pub(crate) use self::exec::Exec;
-pub(crate) use self::lazy::lazy;
+pub(crate) use self::lazy::{lazy, Started as Lazy};
 pub use self::never::Never;