cups-filters 1.24.0 released!

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

Hi,

I have released cups-filters 1.24.0 now, with the following changes:

	- cups-browsed, implicitclass: Support for mixed clusters of
	  remote CUPS queues and IPP network printers. For this PPD
	  files of remote CUPS queues are generated by cups-browsed
	  based on IPP queries, as for native IPP printers, the number
	  of jobs for load balancing is polled in a way that it works
	  also with native IPP printers, the implicitclass backend
	  sends jobs directky to the printer instead of re-queueing
	  them via CUPS.
	- cups-browsed: Merge IPP attributes of several printers to
	  combined attributes for the cluster to generate the
	  cluster's PPD file, including PPD constraints for option
	  combinations not fulfillable by any of the member printers,
	  and finding reasonable, non-conflicting default settings,
	- cups-browsed: Selection algorithm for the destination
	  printer for a job sent to the cluster. Based on the job
	  settings requested such as page size, media type, print
	  quality, ... the best most suitable printer in the cluster
	  for the job will be selected.
	- cups-browsed, implicitclass: Filter jobs to clusters already
	  locally. Due to the fact that a cluster's member printers
	  are not exclusively non-raw CUPS queues with the complete
	  filtering framework on the remote server, but also native
	  IPP printers, we need to support generic driverless printers
	  as destination. So we cannot pass on the input data
	  unfiltered but need to filter locally. We let the cluster's
	  PPD file emulate a PDF printer, letting the local CUPS queue
	  of the cluster run pdftopdf and any pre-filters to turn the
	  input into PDF and we let the implicitclass backend turn PDF
	  into a format understood by the destination printer,
	  supporting the 4 formats of driverless IPP printing: PDF,
	  PWG Raster, Apple Raster, PCLm.

This release is for the integration of Deepak Patankar's Google Summer 
of Code 2018 project with the main goal of clustering different printers 
with cups-browsed and automatically selecting the destination printers 
by job content and option/attribute settings. To achieve this, several 
other features got added to cups-browsed, especially support for mixed 
clusters of remote CUPS queues and native IPP printers and not 
downloading PPDs from remote CUPS servers any more. All changes of this 
release are done by Deepak as parts of his project.

Please release this on Debian so that I can sync it into Ubuntu.

Thanks in advance.

   Till