added new string copy functions with simple formatting and changed awk

error formatter accordingly.
- added qse_strfncpy() and qse_strxfncpy().
- qse_awk_seterror() and qse_awk_rtx_seterror utilize qse_strxfncpy().

qse/lib/awk/run.h

@@ -95,7 +95,7 @@ enum qse_awk_incop_type_t
 extern "C" {
 #endif
 
-qse_char_t* qse_awk_format (
+qse_char_t* qse_awk_rtx_format (
 	qse_awk_rtx_t*    run, 
 	qse_str_t*        out, 
 	qse_str_t*        fbu,