Requests that fail with closed connection errors (ECONNRESET, EPIPE) are
automatically retried.

- `ECONNRESET` (Connection reset by peer): A connection was forcibly
  closed by a peer.closed by a peer. This normally results from a loss
  of the connection on the remote socket due to a timeout or reboot.
  Commonly encountered via the http and net modules.

- `EPIPE` (Broken pipe): A write on a pipe, socket, or FIFO for which
  there is no process to read the data. Commonly encountered at the net
  and http layers, indicative that the remote side of the stream being
  written to has been closed.

Fixes: stripe#1040

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