Make sure crypto-mdebug-backtrace must be enabled explicitely

As it was until now, crypto-mdebug-backtrace was enabled by default
and only disabled if crypto-mdebug was disabled.

Reviewed-by: Rich Salz <rsalz@openssl.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/Configure b/Configure
index 826e88280a..f3eb72b43a 100755
--- a/Configure
+++ b/Configure
@@ -378,6 +378,7 @@ our %disabled = ( # "what"         => "comment"
 		  "zlib"                => "default",
 		  "zlib-dynamic"        => "default",
 		  "crypto-mdebug"       => "default",
+		  "crypto-mdebug-backtrace" => "default",
 		  "heartbeats"          => "default",
 		);