make a weak dep on cups-browsed to prevent cups-browsed disappearing

use pkgconfig in macros.cups and add new macros

fix memory leaks when unloading job

2239982 - cups-2.4.7 is available

use unified __python macro

comply the upgrade script with python2 as well if needed

add upgrade script for setting authentication for CUPS-Get-Document operation

SPDX migration completed

Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild

2218124 - The command "cancel -x <job>" does not remove job files
2218123 - Delays printing to lpd when reserved ports are exhausted
CVE-2023-34241 cups: use-after-free in cupsdAcceptClient() in scheduler/client.c
2217043 - cups-2.4.6 is available

2214860 - cups-2.4.5 is available

fixes CVE-2023-32324
2211834 - cups-2.4.4 is available
1985917 - Cups ignores black and white setting
2094530 - After upgrade 35 to 36 process rastertokpsl (Kyocera cups-filter driver) segfaulted

Drop unnecessary LDFLAGS addition.

fix loading ippeveps in ippeveprinter if only the command name is provided
don't override color settings from print dialog
save the color settings between restarts
check for cmyk when figuring out default options

move /etc/cups into cups-filesystem, since cups-browsed needs it

2165612 - IPP-USB as a weak dependency of CUPS and sane-airscan