SLING-5459 - Recording of tracer logs Tracer servlet would now send a protocol version version against header 'Sling-Tracer-Protocol-Version'. For now its value is 1. This would allow client to determine if they can work against this server or not
sling/trunk/contrib/extensions/tracer/src/main/java/org/apache/sling/tracer/internal/TracerLogServlet.java