When retrieving the Service Desk login page (e.g., https://jira.softwareplant.com/servicedesk/customer/portal/1/user/login), if 'Accept' header is not specified, the response contains 'Content-Type: application/octet-stream' rather than 'text/html'.
$ curl -I -v -H 'Accept:' https://jira.softwareplant.com/servicedesk/customer/portal/1/user/login* Trying 18.184.86.245...
* Connected to jira.softwareplant.com (18.184.86.245) port 443 (#0)
[...]
> HEAD /servicedesk/customer/portal/1/user/login HTTP/1.1
> Host: jira.softwareplant.com
> User-Agent: curl/7.47.0
>
< HTTP/1.1 200
< Date: Fri, 12 Jun 2020 12:00:53 GMT
< Content-Type: application/octet-stream;charset=UTF-8
[...]
If the Accept header is specified, and is different than '*/*', the 'Content-Type' in the response is identical to the 'Accept' header:
$ curl -I -v -H 'Accept:xxx/yyy' https://jira.softwareplant.com/servicedesk/customer/portal/1/user/login
[...]
> HEAD /servicedesk/customer/portal/1/user/login HTTP/1.1
> Host: jira.softwareplant.com
> User-Agent: curl/7.47.0
> Accept:xxx/yyy
>
< HTTP/1.1 200
< Date: Fri, 12 Jun 2020 12:06:15 GMT
< Content-Type: xxx/yyy;charset=UTF-8
[...]
