reqwest exposes the “pool_max_idle_per_host” option of hyper’s client builder. This option used to be called “max_idle_per_host” in the hyper crate, but it has recently been renamed [1]. This patch renames the reqwest representation of this option to make it consistent with its name in the hyper crate again. [1] https://github.com/hyperium/hyper/pull/2142