For assisting in such cases the CMP client offers a workaround via the
B<-unprotected_errors> option, which allows accepting such negative messages.
-If OpenSSL was built with trace support enabled
+If OpenSSL was built with trace support enabled (e.g., C<./config enable-trace>)
and the environment variable B<OPENSSL_TRACE> includes B<HTTP>,
-the request and response headers of HTTP transfers are printed.
+the requests and the response headers transferred via HTTP are printed.
=head1 EXAMPLES