Fix and improve Roxie virtual target handling for HTTP-GET and FORM-POST

Roxie virtual targets were not working for HTTP-GET or HTTP-FORM-POST (urlencoded) requests... because parameter checking wasn't including the virtual targets.

As an improvement, also add support for the "any" target which will search to find the query on any loaded target.  The use of "any" is just a placeholder to use with HTTP-GET and POST urls.  Roxie already searches for the query on all targets if no specific target is specified.