Revision of stackless implementation

- more organized handling of 'nCcalls'
- comments
- deprecation of 'setcstacklimit'

luaconf.h

@@ -36,21 +36,6 @@
 ** =====================================================================
 */
 
-/* >>> move back to llimits.h
-@@ LUAI_MAXCCALLS defines the maximum depth for nested calls and
-** also limits the maximum depth of other recursive algorithms in
-** the implementation, such as syntactic analysis. A value too
-** large may allow the interpreter to crash (C-stack overflow).
-** The default value seems ok for regular machines, but may be
-** too high for restricted hardware.
-** The test file 'cstack.lua' may help finding a good limit.
-** (It will crash with a limit too high.)
-*/
-#if !defined(LUAI_MAXCCALLS)
-#define LUAI_MAXCCALLS		200
-#endif
-
-
 /*
 @@ LUA_USE_C89 controls the use of non-ISO-C89 features.
 ** Define it if you want Lua to avoid the use of a few C99 features