renamed capwap directory to cw.

FossilOrigin-Name: 8a43dd9d05a4cb73210243ddd8df2a26f16c7ef2c4d4e36ab446de1f65d88223

src/cw/bstr_replace.c

@@ -0,0 +1,12 @@
+#include <stdlib.h>
+
+#include "bstr.h"
+
+uint8_t * bstr_replace( bstr_t * dst, uint8_t * bstr)
+{
+	if (*dst)
+		free(*dst);
+
+	*dst = bstr;
+	return *dst;
+}