CLEANUP: assorted typo fixes in the code and comments

This is 11th iteration of typo fixes
diff --git a/src/proto_tcp.c b/src/proto_tcp.c
index d1e89e4..9f03096 100644
--- a/src/proto_tcp.c
+++ b/src/proto_tcp.c
@@ -1640,7 +1640,7 @@
 	return 1;
 }
 
-/* get the retrans counter on a client connexion */
+/* get the retrans counter on a client connection */
 static int
 smp_fetch_fc_retrans(const struct arg *args, struct sample *smp, const char *kw, void *private)
 {