tree-wide: fix assorted typos all over the place

That is "success", "unknown", "through", "performance", "[re|un]mapping"
, "access", "default", "reasonable", "[con]currently", "temperature"
, "channel", "[un]used", "application", "example","hierarchy", "therefore"
, "[over|under]flow", "contiguous", "threshold", "enough" and others.

Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
index 6e5f0e0c..ca4789e 100644
--- a/include/net/sctp/structs.h
+++ b/include/net/sctp/structs.h
@@ -988,7 +988,7 @@
 	int init_sent_count;
 
 	/* state       : The current state of this destination,
-	 *             : i.e. SCTP_ACTIVE, SCTP_INACTIVE, SCTP_UNKOWN.
+	 *             : i.e. SCTP_ACTIVE, SCTP_INACTIVE, SCTP_UNKNOWN.
 	 */
 	int state;