Log Message:
cups-filters: updated to 1.20.4

CHANGES IN V1.20.4
- README: Added link to Issue Tracker on GitHub.
- gstoraster: Removed unneeded "if"s.
- cups-browsed: When checking whether there is already a local
  print queue with the same URI as the one of the discovered
  printer, consider also as equal URI if the URIs only differ
  by use of IPP or IPPS and/or use of HTTPS port 443 instead
  of IPP port 631.
- cups-browsed: Also upgrade from ipp: to ipps: when the ipps:
  URI is on HTTPS port 443 instead of IPP port 631. This is
  common on IPP network printers.
- pdftopdf: Removed support for hardware-implemented reversing
  of page order in PostScript printers. It was once not
  correctly implemented in cups-filters and second, such
  printers are extremely rare, and on Gutenprint PPDs with
  pseudo OutputOrder option hardware reversing was even
  wrongly assumed.
- pdftopdf: Accept option "output-order=normal/reverse" for
  reversing page order and also "page-delivery=
  same-order/reverse-order".
- libcupsfilters: Let the PPD generator add "*PageStackOrder
  ..."  lines to the choices of the "OutputBin" option, to
  mark which output bins need the pages printed in reverse
  order.
- libcupsfilters: Let the PPD generator correctly create a
  "*DefaultOutputOrder: ..."  entry, depending on whether the
  paper is put out face-up or face-down in the default output
  bin.
- libcupsfilters: Fixed human-readable name of the OutputBin
  option in the PPD generator.
- pdftoopvp: Silence compiler warning.
- cups-browsed: If the user modifies/overwrites a print queue
  created by cups-browsed, it will now not only be
  automatically released from the control of cups-browsed, but
  we also create a replacement for our generated local queue
  under a new name.
- cups-browsed: Make URIS for using the implicitclass backend
  correctly working also with queue names containing an '@'
  character.
- braille: Strengthen error checking.
- braille: Index: Replace bogus characters with space.
- braille: Add print and braille page number options.
- braille: Index: Use standard duplex cups option.
- cups-browsed: Moved auto-generation of PPD file for IPP
  network printers from create_remote_printer_entry()
  function to update_cups_queues(). This allows re-creating
  accidentally removed or overwritten local queues without
  losing the PPD file.
- braille: Add option to pick hyphenation rule according to
  current locale and make it the default for second
  translation table.
- braille: Remove generated defs on "make clean".
- braille: Turn non-breakable spaces to spaces.
- braille: Fix character encoding when extracting text. When
  extracing text from a zip file or a pdf, the resulting text
  is always utf-8 independently of the original locale, so we
  need to force that.
- braille: Warn when no text translation was selected in case
  the user didn't notice.
- braille: Fix spurious spacing after last Form-Feed