> /usr/local/bundle/bundler/gems/httpx-0e393987/lib/httpx/options.rb:237: warning: method redefined; discarding old option_pool_options (StandardError)
> /usr/local/bundle/bundler/gems/httpx-0e393987/lib/httpx/options.rb:221: warning: previous definition of option_pool_options was here

Fix duplicate `option_pool_options` method

See merge request !393

in case of multiple connections to the same server, where the server may have closed all of them at the same time, a request will fail after checkout multiple times, before starting a new one where the request may succeed. this patch allows the prior attempts not to exhaust the number of possible retries on the request

it does so by marking the request as ping when the connection it's being sent to is marked as inactive; this leverages the logic of gating retries bookkeeping in such a case

Closes https://github.com/HoneyryderChuck/httpx/issues/92

the native resolver needs to be unselected. it was already, but it was taken into account still for bookkeeping. this removes it from the list by eliminating closed selectables from the list (which were probably already removed from the list via callback)

Closes https://github.com/HoneyryderChuck/httpx/issues/91

don't bookkeep retry attempts when errors happen on just-checked-out open connections

See merge request !394