Relocate a local among other constants/configurations.

nse_main.lua

@@ -49,6 +49,14 @@ local SELECTED_BY_NAME = "NSE_SELECTED_BY_NAME";
 -- count worker threads started by scripts.
 local CONCURRENCY_LIMIT = 1000;
 
+-- Table of different supported rules.
+local NSE_SCRIPT_RULES = {
+  prerule = "prerule",
+  hostrule = "hostrule",
+  portrule = "portrule",
+  postrule = "postrule",
+};
+
 local _G = _G;
 
 local assert = assert;
@@ -124,14 +132,6 @@ local stdnse = require "stdnse";
 -- differentiate between yields initiated by NSE or regular coroutine yields.
 local NSE_YIELD_VALUE = {};
 
--- Table of different supported rules.
-local NSE_SCRIPT_RULES = {
-  prerule = "prerule",
-  hostrule = "hostrule",
-  portrule = "portrule",
-  postrule = "postrule",
-};
-
 do
   -- This is the method by which we allow a script to have nested
   -- coroutines. If a sub-thread yields in an NSE function such as