detect-port: improve comment about sgh pointer

diff --git a/src/detect.h b/src/detect.h
index 663fbc2b0b31585997059a4767a96d325d6c0871..6abd89379447d1ea1331b7f3f808d6a22781bf2a 100644 (file)
--- a/src/detect.h
+++ b/src/detect.h
@@ -229,7 +229,11 @@ typedef struct DetectPort_ {
 
     uint8_t flags;  /**< flags for this port */
 
-    /* signatures that belong in this group */
+    /* signatures that belong in this group
+     *
+     * If the PORT_SIGGROUPHEAD_COPY flag is set, we don't own this pointer
+     * (memory is freed elsewhere).
+     */
     struct SigGroupHead_ *sh;
 
     struct DetectPort_ *prev;