tcp:typo unset should be unsent

Signed-off-by: Weiping Pan <wpan@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 3dd46ea..e2c1333 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -185,7 +185,7 @@
 u32 tcp_default_init_rwnd(u32 mss)
 {
 	/* Initial receive window should be twice of TCP_INIT_CWND to
-	 * enable proper sending of new unset data during fast recovery
+	 * enable proper sending of new unsent data during fast recovery
 	 * (RFC 3517, Section 4, NextSeg() rule (2)). Further place a
 	 * limit when mss is larger than 1460.
 	 */