add SSL_OP_LEGACY_SERVER_CONNECT binding (#9303)

This is useful to expose in pyOpenSSL so that it can be referenced downstream for `Context.set_options`. (mitmproxy/mitmproxy#6281)

Author: mhils

src/_cffi_src/openssl/ssl.py

@@ -72,6 +72,7 @@
 static const long SSL_OP_ALL;
 static const long SSL_OP_SINGLE_ECDH_USE;
 static const long SSL_OP_IGNORE_UNEXPECTED_EOF;
+static const long SSL_OP_LEGACY_SERVER_CONNECT;
 static const long SSL_VERIFY_PEER;
 static const long SSL_VERIFY_FAIL_IF_NO_PEER_CERT;
 static const long SSL_VERIFY_CLIENT_ONCE;