Update cups-filters to 1.28.6

NEWS - OpenPrinting CUPS Filters v1.28.6 - 2020-12-02
-----------------------------------------------------

CHANGES IN V1.28.6

- libcupsfilters: In generated PPDs add a grayscale mode if
  there are only color printing modes (from OpenPrinting
  CUPS).
- libcupsfilters: In generated PPDs add an "OutputBin" option
  also if it has only one choice (OpenPrinting CUPS pull
  request #18).
- libcupsfilters: Generated PPDs could have an "Unknown"
  default InputSlot (OpenPrinting CUPS issue #44).
- cups-browsed: Removed unneeded IPP attribute additions
  preventing the created local queues from preserving a
  location or description the user assigns to them (Issue
  #323).
- cups-browsed: Removed all calls of the resolve_uri() function
  of libcupsfilters, as these are not actually needed and in case
  the supplied DNS-SD-based URI is not resolvable, the function
  gets stuck for ~5 seconds.
- cups-browsed: Fixed several memory leaks, mainly from the
  code to merge printer IPP attributes for clusters (Pull
  request #322).
- cups-browsed: Silenced compiler warning.
- foomatic-rip: Fix infinite loop and input from file on raw
  printing (Pull request #318).
- foomatic-rip: Remove temporary file created during pdf-to-ps
  conversion (Pull request #313).

print/cups-filters/Makefile

@@ -1,7 +1,6 @@
-# $NetBSD: Makefile,v 1.145 2020/12/04 04:56:10 riastradh Exp $
+# $NetBSD: Makefile,v 1.146 2021/01/04 14:38:59 prlw1 Exp $
 
-DISTNAME=	cups-filters-1.28.5
-PKGREVISION=	2
+DISTNAME=	cups-filters-1.28.6
 CATEGORIES=	print
 MASTER_SITES=	http://openprinting.org/download/cups-filters/
 EXTRACT_SUFX=	.tar.xz

print/cups-filters/distinfo

@@ -1,9 +1,9 @@
-$NetBSD: distinfo,v 1.70 2020/10/16 15:17:08 prlw1 Exp $
+$NetBSD: distinfo,v 1.71 2021/01/04 14:38:59 prlw1 Exp $
 
-SHA1 (cups-filters-1.28.5.tar.xz) = d17a5ab3cdd7c0e118c18c25a56f83c973acfa76
-RMD160 (cups-filters-1.28.5.tar.xz) = 6718fee1a0d1387be8439e26a0c8b3b88c95f2fe
-SHA512 (cups-filters-1.28.5.tar.xz) = e020d0e14ad70fbac4d367b4f1d653faf5030b961c6fc4b9f9587c068ccb63c286d07ee32e04e634a877fc8ca90c6dfa4b89aa288e896eea0026e1053cd8a4ef
-Size (cups-filters-1.28.5.tar.xz) = 1502188 bytes
+SHA1 (cups-filters-1.28.6.tar.xz) = 5266d38a1c81e30fd747058c4539f7822c6c8c94
+RMD160 (cups-filters-1.28.6.tar.xz) = 147908f80ff3b2387a41b86bc677875955138d2a
+SHA512 (cups-filters-1.28.6.tar.xz) = 6a353d155ccdcb6882e1fe33d730efded0c49c00a5946c099a983701e1abcd929469762bfa6b04b8bc3ab0b76cb374db04eb96d50b094b51eac56ec87517d784
+Size (cups-filters-1.28.6.tar.xz) = 1503080 bytes
 SHA1 (patch-filter_gstoraster.c) = 4eef8d91d8ca26a5a874e29885b836e9670d9e5d
 SHA1 (patch-filter_mupdftoraster.c) = 81a06cbb3be9a7fd3e797a2effa5ef0aecfc2621
 SHA1 (patch-fontembed_test__pdf.c) = 5ffb13a59ed4d860a3ae4355e364059973715290