CLEANUP: assorted typo fixes in the code and comments

This is 22nd iteration of typo fixes
diff --git a/src/action.c b/src/action.c
index 5e430f2..98359ba 100644
--- a/src/action.c
+++ b/src/action.c
@@ -25,7 +25,7 @@
 
 
 /* Check an action ruleset validity. It returns the number of error encountered
- * andd err_code is updated if a warning is emitted.
+ * and err_code is updated if a warning is emitted.
  */
 int check_action_rules(struct list *rules, struct proxy *px, int *err_code)
 {