Network printers using lpd remote connection
Some printers use the rp value to specify file processing. The value is
printer dependent and case sensitive. For HP LaserJet printers, use 'text'
to process text files, and 'raw' for no file processing, and for all other
file types including PostScript files.
Print filters are not used, even when specified. Printing features such as
banner pages, landscape printing and tray selection are not available.