Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/include/net/ip_vs.h b/include/net/ip_vs.h
index 30b49ed..814b434 100644
--- a/include/net/ip_vs.h
+++ b/include/net/ip_vs.h
@@ -92,7 +92,7 @@
 }
 /*
  * This one needed for single_open_net since net is stored directly in
- * private not as a struct i.e. seq_file_net cant be used.
+ * private not as a struct i.e. seq_file_net can't be used.
  */
 static inline struct net *seq_file_single_net(struct seq_file *seq)
 {