NFSv4: Send implementation id with exchange_id

Send the nfs implementation id in EXCHANGE_ID requests unless the module
parameter nfs.send_implementation_id is 0.

This adds a CONFIG variable for the nii_domain that defaults to "kernel.org".

Signed-off-by: Weston Andros Adamson <dros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 1d369c6..7bae0fd 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1678,6 +1678,15 @@
 			back to using the idmapper.
 			To turn off this behaviour, set the value to '0'.
 
+	nfs.send_implementation_id =
+			[NFSv4.1] Send client implementation identification
+			information in exchange_id requests.
+			If zero, no implementation identification information
+			will be sent.
+			The default is to send the implementation identification
+			information.
+
+
 	nmi_debug=	[KNL,AVR32,SH] Specify one or more actions to take
 			when a NMI is triggered.
 			Format: [state][,regs][,debounce][,die]