Backend.md in fastly-7.1.0

- old
+ new
@@ -21,9 +21,10 @@
 | **min_tls_version** | **String** | Minimum allowed TLS version on SSL connections to this backend. If your backend server is not able to negotiate a connection meeting this constraint, a synthetic `503` error response will be generated. | [optional] |
 | **name** | **String** | The name of the backend. | [optional] |
 | **override_host** | **String** | If set, will replace the client-supplied HTTP `Host` header on connections to this backend. Applied after VCL has been processed, so this setting will take precedence over changing `bereq.http.Host` in VCL. | [optional] |
 | **port** | **Integer** | Port on which the backend server is listening for connections from Fastly. Setting `port` to 80 or 443 will also set `use_ssl` automatically (to false and true respectively), unless explicitly overridden by setting `use_ssl` in the same request. | [optional] |
 | **request_condition** | **String** | Name of a Condition, which if satisfied, will select this backend during a request. If set, will override any `auto_loadbalance` setting. By default, the first backend added to a service is selected for all requests. | [optional] |
+| **share_key** | **String** | Value that when shared across backends will enable those backends to share the same health check. | [optional] |
 | **shield** | **String** | Identifier of the POP to use as a [shield](https://docs.fastly.com/en/guides/shielding). | [optional] |
 | **ssl_ca_cert** | **String** | CA certificate attached to origin. | [optional] |
 | **ssl_cert_hostname** | **String** | Overrides `ssl_hostname`, but only for cert verification. Does not affect SNI at all. | [optional] |
 | **ssl_check_cert** | **Boolean** | Be strict on checking SSL certs. | [optional][default to true] |
 | **ssl_ciphers** | **String** | List of [OpenSSL ciphers](https://www.openssl.org/docs/manmaster/man1/ciphers.html) to support for connections to this origin. If your backend server is not able to negotiate a connection meeting this constraint, a synthetic `503` error response will be generated. | [optional] |