Prefer sending jobs in Apple Raster instead of in PDF

If a destination printer supports both PDF and Apple Raster, and if it
is not a remote CUPS queue, prefer sending the job in Apple Raster, as
printers print this more reliably. PDF interpreters in printers are
often slow or can easily have bugs.

Should fix https://bugs.launchpad.net/bugs/2014976

Author: tillkamppeter

daemon/cups-browsed.c

@@ -6913,13 +6913,14 @@ on_job_state (CupsNotifier *object,
       }
 
       // The priority order for the PDLs is the same as in the
-      // PPD generator in cupsfilters/ppdgenerator.c
+      // PPD generator in ppd/ppd-generator.c of libppd
       document_format = (char *)malloc(sizeof(char) * 32);
-      if (cupsArrayFind(pdl_list, "application/vnd.cups-pdf") ||
-	  cupsArrayFind(pdl_list, "application/pdf"))
+      if (cupsArrayFind(pdl_list, "application/vnd.cups-pdf"))
 	strcpy(document_format, "application/vnd.cups-pdf");
       else if (cupsArrayFind(pdl_list, "image/urf"))
 	strcpy(document_format, "image/urf");
+      else if (cupsArrayFind(pdl_list, "application/pdf"))
+	strcpy(document_format, "application/vnd.cups-pdf");
       else if (cupsArrayFind(pdl_list, "image/pwg-raster"))
 	strcpy(document_format, "image/pwg-raster");
       else if (cupsArrayFind(pdl_list, "application/PCLm"))