Log at info level when disabling SSLv3

src/common/tortls.c

@@ -771,6 +771,12 @@ tor_tls_context_new(crypto_pk_env_t *identity, unsigned int key_lifetime,
       (SSLeay() >= 0x00909000L &&
        SSLeay() <  0x1000006fL)) {
     /* And not SSL3 if it's subject to CVE-2011-4657. */
+    log_info(LD_NET, "Disabling SSLv3 because this OpenSSL version "
+             "might otherwise be vulnerable to CVE-2011-4657 "
+             "(compile-time version %08lx (%s); "
+             "runtime version %08lx (%s))",
+             OPENSSL_VERSION_NUMBER, OPENSSL_VERSION_TEXT,
+             SSLeay(), SSLeay_version(SSLEAY_VERSION));
     SSL_CTX_set_options(result->ctx, SSL_OP_NO_SSLv3);
   }