Merge pull request #37518 from acwwat/d-aws_cloudfront_distribution-improve_origin_ssl_protocols_arg_desc

docs: Improve origin_ssl_protocols arg doc for aws_cloudfront_distribution

Author: justinretzolk

website/docs/r/cloudfront_distribution.html.markdown

@@ -394,7 +394,7 @@ argument should not be specified.
 * `http_port` (Required) - HTTP port the custom origin listens on.
 * `https_port` (Required) - HTTPS port the custom origin listens on.
 * `origin_protocol_policy` (Required) - Origin protocol policy to apply to your origin. One of `http-only`, `https-only`, or `match-viewer`.
-* `origin_ssl_protocols` (Required) - SSL/TLS protocols that you want CloudFront to use when communicating with your origin over HTTPS. A list of one or more of `SSLv3`, `TLSv1`, `TLSv1.1`, and `TLSv1.2`.
+* `origin_ssl_protocols` (Required) - List of SSL/TLS protocols that CloudFront can use when connecting to your origin over HTTPS. Valid values: `SSLv3`, `TLSv1`, `TLSv1.1`, `TLSv1.2`. For more information, see [Minimum Origin SSL Protocol](https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/distribution-web-values-specify.html#DownloadDistValuesOriginSSLProtocols) in the Amazon CloudFront Developer Guide.
 * `origin_keepalive_timeout` - (Optional) The Custom KeepAlive timeout, in seconds. By default, AWS enforces an upper limit of `60`. But you can request an [increase](http://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/RequestAndResponseBehaviorCustomOrigin.html#request-custom-request-timeout). Defaults to `5`.
 * `origin_read_timeout` - (Optional) The Custom Read timeout, in seconds. By default, AWS enforces an upper limit of `60`. But you can request an [increase](http://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/RequestAndResponseBehaviorCustomOrigin.html#request-custom-request-timeout). Defaults to `30`.