Add SSL_renegotiate binding.
diff --git a/src/_cffi_src/openssl/ssl.py b/src/_cffi_src/openssl/ssl.py
index 798fcb1..f14aaba 100644
--- a/src/_cffi_src/openssl/ssl.py
+++ b/src/_cffi_src/openssl/ssl.py
@@ -205,6 +205,7 @@
 int SSL_get_error(const SSL *, int);
 int SSL_do_handshake(SSL *);
 int SSL_shutdown(SSL *);
+int SSL_renegotiate(SSL *);
 const char *SSL_get_cipher_list(const SSL *, int);
 Cryptography_STACK_OF_SSL_CIPHER *SSL_get_ciphers(const SSL *);