Restore the "heartbeats" configuration option among the deprecated

Removing the option entirely would break builds unnecessarily, so
let's make it deprecated.

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/8632)

1 files changed, 1 insertions, 0 deletions

diff --git a/CHANGES b/CHANGES
index 1d093142b7..28d732bcf1 100644
--- a/CHANGES
+++ b/CHANGES
@@ -16,6 +16,7 @@
 
   *) Removed the heartbeat message in DTLS feature, as it has very
      little usage and doesn't seem to fulfill a valuable purpose.
+     The configuration option is now deprecated.
      [Richard Levitte]
 
   *) Changed the output of 'openssl {digestname} < file' to display the