We fixed #15937, update a comment

src/test/test-network.sh

@@ -69,8 +69,8 @@ do
     ;;
     # Make this many connections per client (1)
     # Note: If you create 7 or more connections to a hidden service from
-    # a single client, you'll likely get a verification failure due to
-    # https://trac.torproject.org/projects/tor/ticket/15937
+    # a single Tor 0.2.7 client, you'll likely get a verification failure due
+    # to #15937. This is fixed in 0.2.8.
     --connections|--connection|--connection-count|--count)
       export CHUTNEY_CONNECTIONS="$2"
       shift