[NET]: Add NET_PKTGEN.

net/Kconfig

@@ -621,5 +621,25 @@ source "net/sched/Kconfig"
 #bool 'Network code profiler' CONFIG_NET_PROFILE
 endmenu
 
+menu "Network testing"
+
+config NET_PKTGEN
+	tristate "Packet Generator (USE WITH CAUTION)"
+	---help---
+	  This module will inject preconfigured packets, at a configurable
+	  rate, out of a given interface.  It is used for network interface
+	  stress testing and performance analysis.  If you don't understand
+	  what was just said, you don't need it: say N.
+
+	  Documentation on how to use the packet generaor can be found
+	  at <file:Documentation/networking/pktgen.txt>.
+
+	  This code is also available as a module called pktgen.o ( = code
+	  which can be inserted in and removed from the running kernel
+	  whenever you want).  If you want to compile it as a module, say M
+	  here and read <file:Documentation/modules.txt>.
+
+endmenu
+
 endmenu