Add a log about the tracing functionality

Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/8198)

1 files changed, 9 insertions, 0 deletions

diff --git a/CHANGES b/CHANGES
index ff61ff4383..d977c76656 100644
--- a/CHANGES
+++ b/CHANGES
@@ -9,6 +9,15 @@
 
  Changes between 1.1.1 and 3.0.0 [xx XXX xxxx]
 
+  *) Added support for enabling instrumentation through trace output.
+     This is left to application control, by allowing it to register BIOs as
+     channels for a number of tracing and debugging categories.
+
+     The 'openssl' application has been expanded to enable any of the types
+     available via environment variables defined by the user, and serves as
+     one possible example on how to use this functionality.
+     [Richard Levitte & Matthias St. Pierre]
+
   *) Added build tests for C++.  These are generated files that only do one
      thing, to include one public OpenSSL head file each.  This tests that
      the public header files can be usefully included in a C++ application.