Add waf rule to inspect and match header values for all incoming requests.

[OlamideOl1]

Add waf rule to inspect and match header values for all incoming requests This rule will check the specified header and against the specified value and carry out the action (count or block) provided if there is a match. A sample use case is to match all requests containing www.example.com in the host header and block / count them. You can also use this to match authentication values by checking the value in the request header against a preset value.