Cleaning of llimits.h

Several definitions that don't need to be "global" (that is, that
concerns only specific parts of the code) moved out of llimits.h,
to more appropriate places.

lparser.c

@@ -859,7 +859,7 @@ static void recfield (LexState *ls, ConsControl *cc) {
   int reg = ls->fs->freereg;
   expdesc tab, key, val;
   if (ls->t.token == TK_NAME) {
-    checklimit(fs, cc->nh, MAX_INT, "items in a constructor");
+    checklimit(fs, cc->nh, INT_MAX, "items in a constructor");
     codename(ls, &key);
   }
   else  /* ls->t.token == '[' */