fix default backend for parallel port printer in cups

git-svn-id: svn://svn.openwrt.org/openwrt/trunk/openwrt@444 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/cups/files/etc/cups/printers.conf

@@ -13,7 +13,7 @@ KLimit 0
 <Printer LP>
 Info Parallel Port Printer
 Location
-DeviceURI usb:/dev/printers/0
+DeviceURI parallel:/dev/printers/0
 State Idle
 Accepting Yes
 JobSheets none none