Description:
------------
When you run the below script you'll see the Content-Length header will come back with the correct value, but that the word Content is jumbled.  For example:

Cteonnt-Length: 195628.

If you change Accept-Encoding to identity (disable compression) the value comes back correctly.  This is causing unexpected end of data errors when we use SoapClient to attempt to parse a WSDL as only part of the XML is returned.

There is a lot of testing information here:

https://stackoverflow.com/questions/61681804/php-file-get-contents-returning-inconsistent-partial-data-for-http-requests

Test script:
---------------
php << 'EOF'
<?php
$ctx = stream_context_create(array(
    'http' => array(
        'header' => "Accept-Encoding: gzip"
     )
));
$xml = file_get_contents('https://webservices3.autotask.net/atservices/1.6/atws.wsdl', false, $ctx);
echo var_dump($http_response_header);
?>
EOF

Expected result:
----------------
Content-Length should remain with the same header name.

Actual result:
--------------
Content-Length header field name is corrupted.