Log Message:
cups-filters: Update print/cups-filters to 1.20.1

Changes:
1.20.1
------
 - libcupsfilters: Silenced warning when using CUPS < 2.x by
   eliminating the use of a recently introduced CUPS library
   function (Bugzilla bug #1421).
 - braille: Fix some missing options on indexv4. Thanks to
   Samuel Thibault for this patch (Pull request #21).
 - braille: Fix disabling margins on indexv4 in graphic
   mode. Thanks to Samuel Thibault for this patch (Pull request
   #20).
 - braille: Fix installation of brftopagedbrf. Thanks to Samuel
   Thibault for this patch (Pull request #18, Issue #17).
 - cups-browsed: Fixed crash when CUPS reports a print queue
   without "device-uri" attribute when cups-browsed polls a
   list of local CUPS queues (Issue #16).

1.20.0
------
 - libcupsfilters: Let the PPD generator prefer the English
   translation file from CUPS for the human-readable strings in
   the PPD files.
 - libcupsfilters: The PPD generator lists all page sizes with
   human-readable names now, including proprietary names of the
   printer.
 - cups-browsed, driverless: Fixed get-printer-attributes call
   on driverless printers for generating the PPD, explicitly
   requesting the media-col-database attribute as otherwise
   borderless page sizes do not appear.
 - libcupsfilters: Fixed loading option/choice strings lists
   from driverless printers for PPD file generation. Especially
   proprietary media types appear correctly now.
 - libcupsfilters: Completed color space support in the PPD
   generator: Added DeviceGray/RGB/CMYK, default to 8 bit for
   SRGB and to 16 bit for AdobeRGB, avoid duplicate listings of
   the same color space.

1.19.0
------
 - libcupsfilters: Let the PPD generator add the options "Print
   Optimization", "Print Rendering Intent" and "Print \ 
Scaling"
   if appropriate IPP attributes are found.
 - libcupsfilters: Let the PPD generator read out the maximum
   of info about color spaces and this way not only reliably
   the correct choices are added to the ColorModel option but
   also the maximum supported bit depth (8 or 16 bit) is used.
 - libcupsfilters: Overtaken new features from CUPS' PPD
   generator: Presets, Finishing Templates, and extraction of
   media sizes from "media-col-database"
 - libcupsfilters: Improvements on header of generated PPDs:
   use cups-filters version number, "drvless.ppd" PCFileName,
   APSupplies and cupsChargeInfoURI from CUPS.
 - libcupsfilters: Let the PPD generator use the IPP string
   tables in the translation files of CUPS 2.3.x or newer
   (English strings only). Let all options in the PPD have
   human-readable option and choice names. In case of CUPS
   2.2.x or older (or if the CUPS translation are missing) we
   fall back to internal tables.
 - cups-browsed: Improved debug output when checking IPP
   attributes of IPP printers.
 - .gitignore: Ignore also core files.
 - cups-browsed: Support use of PPD files generated by CUPS for
   IPP Printers. Works only if the the local queue created by
   cups-browsed replaces a temporary queue from CUPS.
   Configurable via "UseCUPSGeneratedPPDs" directive in
   cups-browsed.conf.

1.18.0
------
 - braille: Add support for page-ranges option. Thanks to
          Samuel Thibault for this patch (Pull request #12).
 - braille: Fix supporting docx and LO file names with
          spaces. Thanks to Samuel Thibault for this patch (Pull
          request #11).
 - .gitignore: Updated and cleaned up.
 - Build system: Make sure that "make dist" always includes all
   files of the repository, plus the files generated by
   ./autogen.sh, independent of the system configuration and
   the used ./configure options.
 - pdftoijs, pdftoopvp: Build pdftoijs and pdftoopvp only on
   demand (via "--enable-ijs" and "--enable-opvp" on the
   ./configure command line). There are actually no known
   printer drivers using these filters. If no one complains
   about the missing filters they will get completely removed.
 - Build system: Set default path for pdftops to
   /usr/bin/pdftops also for cross-compiling (Bug #1417).
 - cups-browsed: Set "printer-location" as an attribute and not
   as an option when creating/updating a CUPS queue (Bug
   #1413).
 - braille: Fix handling non-printable characters in BRF
   files. Thanks to Samuel Thibault for this patch.
 - braille: Fix printing backslashes in BRF files. Thanks to
   Samuel Thibault for this patch.
 - braille: use application/vnd.cups-brf instead of
   text/vnd.cups-brf. Thanks to Samuel Thibault for this patch.
 - braille: Make sure liblouis emits pure BRF output. Thanks to
   Samuel Thibault for this patch.
 - braille: Spaces at the head of lines were not getting
   embossed, because bash would eat them in the read
   command. IFS allows to avoid the issue. Thanks to Samuel
   Thibault for this patch.
 - gstoraster: Emit proper error message if Ghostscript is
   missing.  Thanks to Peter De Wachter (pdewacht at gmail dot
   com) for the patch (Bug #1415).
 - braille: Old bash does not like quotes, like in '$(("123" +
   0))'. Removed unneeded quotes. Thanks to Samuel Thibault for
   this patch.
 - braille: Index V5 embossers are compatible with the V4
   protocol so we do not need driver changes, we just need to
   advertise the support. Thanks to Samuel Thibault for this
   patch.