cups-filters 1.28.17 released!

[Till Kamppeter <till.kamppeter@gmail.com>]

Hi,

I have released cups-filters 1.28.17 now, with the following changes:

	- libcupsfilters: In PPD generator create only one *cupsFilter2:
	  line for raster. Only use the most desirable/reliable format,
	  usually Apple Raster.
	- libcupsfilters: In get_printer_attributes() poll
	  "media-col-database" separately if needed. On some printers
	  one gets "media-col-database" only this way. Often it reveals
	  important functionality, like for example borderless
	  printing.
	- libcupsfilters: Let PPD generator also parse
	  "media-col-ready" IPP attribute. "media-col-ready" lists the
	  loaded media, in contrary to "media-ready", as list of
	  complete descriptions of the media ("media-col" data
	  structure).  This often lists also variants like borderless
	  (it is the same physical paper). Especially useful when
	  "media-col-database" is not available.
	- libcupsfilters: In generate_sizes() consider all margin
	  alternatives. When generating the PPD file for a driverless
	  printer, and in the media-{left,right,top,bottom}-margin-
	  supported printer IPP attributes there was more than 1 value,
	  the first value (which often was the 0 for borderless
	  printing) was not considered, leaving the borderless
	  functionality of many printers undiscovered (Issues #492).

Bug fix release, to more reliably discover all printer capablities from 
driverless printers, especially borderless printing, and to preferably 
use Apple Raster instead of PWG Raster or PCLM.

This is primarily for Bookworm as Bookworm will most probably not adopt 
cups-filters 2.x.

Thanks in advance.

   Till