doc/man7/openssl-env.pod: document HARNESS_OSSL_PREFIX environment variable

For historical purposes.

Signed-off-by: Eugene Syromiatnikov <esyr@openssl.org>
Reviewed-by: Neil Horman <nhorman@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Dmitry Belyavskiy <beldmit@gmail.com>
(Merged from https://github.com/openssl/openssl/pull/28025)

diff --git a/doc/man7/openssl-env.pod b/doc/man7/openssl-env.pod
index efc2adb0a1277c8e9ec319ad8c7509fddbd56278..9251f31020b1843917c6775ffdd8e9f520e25057 100644 (file)
--- a/doc/man7/openssl-env.pod
+++ b/doc/man7/openssl-env.pod
@@ -222,6 +222,24 @@ Additional arguments for the L<tsget(1)> command.
 
 =back
 
+=head1 HISTORY
+
+This section contains environment variables that are no longer considered
+by the OpenSSL libraries and commands.
+
+=over 4
+
+=item B<HARNESS_OSSL_PREFIX>
+
+This environment variable, existed in OpenSSL versions from 1.1.1 up to 3.5,
+allowed specification of a prefix prepended to each line sent to the I<stdout>
+by L<openssl(1)>, used by the test harness to avoid commingling the command
+under test output with the output for the TAP consumer.
+
+This variable was not considered security-sensitive.
+
+=back
+
 =head1 COPYRIGHT
 
 Copyright 2019-2024 The OpenSSL Project Authors. All Rights Reserved.