net: more spelling fixes

Various spelling fixes in networking stack

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv4/ip_sockglue.c

@@ -1051,7 +1051,7 @@ e_inval:
  *
  * To support IP_CMSG_PKTINFO option, we store rt_iif and specific
  * destination in skb->cb[] before dst drop.
- * This way, receiver doesnt make cache line misses to read rtable.
+ * This way, receiver doesn't make cache line misses to read rtable.
  */
 void ipv4_pktinfo_prepare(const struct sock *sk, struct sk_buff *skb)
 {