Updates the libinjection

Windows compilation was failing due to the utilization of size_t which is part
of the strings.h. strings.h was not part of windows and so the compilation
was failing. This update fix that. Issue #65 on libinjection:
https://github.com/client9/libinjection/issues/65

apache2/libinjection/libinjection.h

@@ -11,9 +11,15 @@
 #define _LIBINJECTION_H
 
 #ifdef __cplusplus
-extern "C" {
+# define LIBINJECTION_BEGIN_DECLS    extern "C" {
+# define LIBINJECTION_END_DECLS      }
+#else
+# define LIBINJECTION_BEGIN_DECLS
+# define LIBINJECTION_END_DECLS
 #endif
 
+LIBINJECTION_BEGIN_DECLS
+
 /*
  * Pull in size_t
  */
@@ -43,8 +49,17 @@ const char* libinjection_version(void);
  */
 int libinjection_sqli(const char* s, size_t slen, char fingerprint[]);
 
-#ifdef __cplusplus
+/** ALPHA version of xss detector. 
-}
+ *
-#endif
+ * NOT DONE. 
+ *
+ * \param[in] s  input string, may contain nulls, does not need to be null-terminated
+ * \param[in] slen input string length
+ * \return 1 if XSS found, 0 if benign
+ *
+ */
+int libinjection_xss(const char* s, size_t slen);
+
+LIBINJECTION_END_DECLS
 
 #endif /* _LIBINJECTION_H */

apache2/libinjection/libinjection_html5.h

@@ -7,7 +7,7 @@ extern "C" {
 
 /* pull in size_t */
 
-#include <strings.h>
+#include <stddef.h>
 
 enum html5_type {
     DATA_TEXT