Fix error path in int create_ssl_ctx_pair()
Fix error path in int create_ssl_ctx_pair()

If we hit the error path and create_ssl_ctx_pair has been passed a
pre-created SSL_CTX then we could end up with a double free.

Reviewed-by: Shane Lontis <452ce16516ceed26291fe7de3f8b53540d83864e@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/11834)

openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl