[NTG-pdftex] review of some paraneters in config file

Hi, a few parameters have been added to config file: pdf12compliantcode pdf13compliantcode pdfminorversioncode alwaysusepdfpageboxcode pdfoptionpdfinclusionerrorlevel I wonder whether we have to change a few of them; as pdf12compliantcode pdf13compliantcode are here, then we probably have to do the same thing for pdf1.4, pdf1.5 and so on. And when we get to pdf2.0, we will have to have something like pdfmajorversioncode. So if not too many people are depending on those above features, I am going to reimplement them. Please let me know your opinions. Regards, Thanh