curl: OpenSSL backend: X509 peer certificate not freed in ossl_get_channel_binding causes per-request memory leak (DoS risk for long-lived clients)

Summary: In curl’s OpenSSL backend, osslgetchannelbinding retains a new reference to the server’s X509 certificate via SSLget1peercertificate and never releases it. When Negotiate SPNEGO over TLS is in use, this path is invoked and leaks one X509 object per trigger. Over many requests in a...