* debian/patches/43_fix-driver-package-installation-with-install-printerdriver.patch:
  Simplified communication between system-config-printer and
  install-printerdriver helper script (LP: #1412722).
* debian/patches/45_do-not-crash-on-licensetext-being-none.patch: Crash
  guard for displaying OpenPrinting driver record where the licensetext
  field is None (LP: #1412729).
* debian/patches/47_support-licensetext-in-separate-url.patch: Added support
  for OpenPrinting driver records with license text linked from separate
  download URL (LP: #1412729).
* debian/patches/50_fix-crash-in-nextnptab-if-driver-is-zero.patch: Trivial
  patch to avoid crashes when installing downloadable printer driver
  packages via OpenPrinting. These crashes were observed via the Ubuntu
  error reporting system.