spelling fixes: Documentation/

Spelling fixes in Documentation/.

Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Adrian Bunk <bunk@kernel.org>
diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index 6ae2fef..747a5d1 100644
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -293,7 +293,7 @@
 	when the connection closes, so that connections established in the
 	near future can use these to set initial conditions.  Usually, this
 	increases overall performance, but may sometimes cause performance
-	degredation.  If set, TCP will not cache metrics on closing
+	degradation.  If set, TCP will not cache metrics on closing
 	connections.
 
 tcp_orphan_retries - INTEGER