nbd: bump version to 3.11

Signed-off-by: Marcin Jurkowski <marcin1j@gmail.com>

net/nbd/Makefile

@@ -8,12 +8,12 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=nbd
-PKG_VERSION:=2.9.23
+PKG_VERSION:=3.11
 PKG_RELEASE:=1
 
-PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
 PKG_SOURCE_URL:=@SF/nbd
-PKG_MD5SUM:=065b6ded41887a08be6dbb8d77280f24
+PKG_MD5SUM:=73d11644a28b9f335292cdb3bdc4b74b
 PKG_MAINTAINER:=Marcin Jurkowski <marcin1j@gmail.com>
 
 PKG_INSTALL:=1