fixed StdAwk to set the MODPREFIX when dlfcn is activated.

added Awk::getCmgr()
enhanced some string functions to handle byte strings

qse/include/qse/awk/Awk.hpp

@@ -959,6 +959,8 @@ public:
 	/// called close() for finalization before the destructor is executed.
 	virtual ~Awk () {}
 
+	qse_cmgr_t* getCmgr () const;
+
 	///
 	/// The open() function initializes an interpreter. 
 	/// You must call this function before doing anything meaningful.

qse/include/qse/awk/awk.h

@@ -2231,6 +2231,11 @@ QSE_EXPORT qse_mmgr_t* qse_awk_rtx_getmmgr (
 	qse_awk_rtx_t* rtx /**< runtime context */
 );
 
+QSE_EXPORT qse_cmgr_t* qse_awk_rtx_getcmgr (
+	qse_awk_rtx_t* rtx /**< runtime context */
+);
+
+
 /**
  * The qse_awk_rtx_getxtn() function gets the pointer to the extension area
  * created with qse_awk_rtx_open().