integration work:

- use SWI flags whenever possible
  - support by module unknown, escapes, strings
  - accesss thread info fom SWI
  - allow strings to be input as strings.
  - remove some unused flags.

H/rlocals.h

@@ -229,6 +229,8 @@ static void RestoreWorker(int wid USES_REGS) {
 
 
 
+
+