name "_ENV" configurable through 'luaconf.h'

luaconf.h

@@ -1,5 +1,5 @@
 /*
-** $Id: luaconf.h,v 1.141 2010/07/25 15:02:41 roberto Exp roberto $
+** $Id: luaconf.h,v 1.142 2010/07/28 15:51:59 roberto Exp roberto $
 ** Configuration file for Lua
 ** See Copyright Notice in lua.h
 */
@@ -115,6 +115,14 @@
 #endif
 
 
+/*
+@@ LUA_ENV is the name of the variable that holds the current
+@@ environment, used to access global names.
+** CHANGE it if you do not like this name.
+*/
+#define LUA_ENV		"_ENV"
+
+
 /*
 @@ LUA_API is a mark for all core API functions.
 @@ LUALIB_API is a mark for all auxiliary library functions.