[master] a3a820fb9 Don't document Debug VSL's, they are not a supported and stable facility.

[Poul-Henning Kamp]

commit a3a820fb9b6311655545957ace4d2345e2c50e6a
Author: Poul-Henning Kamp <phk at FreeBSD.org>
Date:   Mon Sep 17 06:41:15 2018 +0000

    Don't document Debug VSL's, they are not a supported and stable
    facility.

diff --git a/doc/sphinx/whats-new/upgrading-6.1.rst b/doc/sphinx/whats-new/upgrading-6.1.rst
index 94723e600..c7e8686c9 100644
--- a/doc/sphinx/whats-new/upgrading-6.1.rst
+++ b/doc/sphinx/whats-new/upgrading-6.1.rst
@@ -181,12 +181,6 @@ Other changes
     In particular, http connection (HTC) errors are now reported
     symbolically in addition to the previous numerical value.
 
-  * ``Debug`` log entries may also give more diagnostic information
-    about session accept failures (failure to accept a client
-    connection). These must be viewed in raw grouping, since accept
-    failures are not part of any request/response transaction. The
-    ``Debug`` message begins with the phrase ``"Accept failed"``.
-
   * When a backend is unhealthy, ``Backend_health`` now reports some
     diagnostic information in addition to the HTTP response and timing
     information.