val call3 = client.newCall(Request(server.url("/")))
    call3.execute().use { response ->
      assertThat(
        response.body.string(),
      ).isEqualTo("c")
    }

    // All calls share a connection.
    assertThat(server.takeRequest().sequenceNumber).isEqualTo(0)
    assertThat(server.takeRequest().sequenceNumber).isEqualTo(1)
    assertThat(server.takeRequest().sequenceNumber).isEqualTo(2)
  }

 * equal, and the [equals()][Object.equals] method between them returns true:
 *
 *  * https://example.net/
 *
 *  * https://example.com/
 *
 * This is because those two hosts share the same IP address. This is an old, bad design decision
 * that makes `java.net.URL` unusable for many things. It shouldn't be used as a [Map] key or in a