add Samsung SCX-4835FD networked support, reported by Dave Lewis.

USB mode doesn't work.
 found USB scanner (vendor=0x04e8 [Samsung Electronics Co., Ltd.],
 product=0x344b [SCX-483x 5x3x Series])

ChangeLog

@@ -1,3 +1,7 @@
+2012-04-03 Alex Belkin <abc at telekom.ru>
+	* doc/descriptions/xerox_mfp.desc: add Samsung SCX-4835FD networked
+	support, reported by Dave Lewis. USB mode doesn't work.
+
 2013-04-02 Stéphane Voltz <stef.dev@free.fr>
 	* backend/lexmark.c backend/lexmark.h: fix device detection to
 	handle hotplugging and unplugging of USB devices. USe

doc/descriptions/xerox_mfp.desc

@@ -128,6 +128,11 @@
 :usbid "0x04e8" "0x344b"
 :status :good
 
+:model "SCX-4835FD"
+:interface "Ethernet"
+:usbid "0x04e8" "0x344b"
+:status :good
+
 :model "SCX-3405W"
 :interface "Ethernet"
 :status :basic