Limit rsub null termination to where necessary

CHANGES

@@ -1,6 +1,8 @@
 DD mmm YYYY - 2.9.x (to be released)
 -------------------
 
+ * Limit rsub null termination to where necessary
+   [Issue #2794 - @marcstern, @martinhsv]
  * IIS: Update dependencies for next planned release
    [@martinhsv]
  * XML parser cleanup: NULL duplicate pointer

apache2/re_operators.c

@@ -656,7 +656,9 @@ nextround:
         msr->if_stream_changed = 1;
 
         memcpy(msr->stream_input_data, data, size);
+#ifndef MSC_LARGE_STREAM_INPUT
         msr->stream_input_data[size] = '\0';
+#endif
 
         var->value_len = size;
         var->value = msr->stream_input_data;