Created attachment 33007 [details] patch against trunk. The Semaphore Valve does not exist in the Valve configuration document. Therefore, I created a document.
Thanks for the report and the patch. The patch has been applied (with some minor changes) to trunk, 8.0.x (for 8.0.26 onwards), 7.0.x (for 7.0.64 onwards) and 6.0.x (for 6.0.45 onwards).