ModSecurity: improving duplicate ID search

apache2/modsecurity.h

@@ -572,6 +572,9 @@ struct directory_config {
     /* Collection timeout */
     int col_timeout;
 
+    /* hash of ids */
+    apr_hash_t          *rule_id_htab;
+
     /* Hash */
     apr_array_header_t  *hash_method;
     const char *crypto_key;