How can I force cURL to send an invalid HTTP header, as follows:
curl -k 'https://192.168.1.1/' -H 'Host: 192.168.1.1' -H 'blah' -H 'Accept-Encoding: gzip, deflate, br' -H 'Accept-Language: en-US,en;q=0.8'
When I try the above, cURL helpfully leaves out the invalid header.