restore this constant, pyopenssl needs it (#3321)
diff --git a/src/_cffi_src/openssl/ssl.py b/src/_cffi_src/openssl/ssl.py
index 12af346..6fdc201 100644
--- a/src/_cffi_src/openssl/ssl.py
+++ b/src/_cffi_src/openssl/ssl.py
@@ -44,6 +44,7 @@
static const long Cryptography_HAS_SSL_OP_NO_TICKET;
static const long Cryptography_HAS_NETBSD_D1_METH;
static const long Cryptography_HAS_ALPN;
+static const long Cryptography_HAS_NEXTPROTONEG;
static const long Cryptography_HAS_SET_CERT_CB;
static const long SSL_FILETYPE_PEM;
@@ -578,6 +579,8 @@
static const long Cryptography_HAS_NETBSD_D1_METH = 1;
#endif
+static const long Cryptography_HAS_NEXTPROTONEG = 1;
+
/* ALPN was added in OpenSSL 1.0.2. */
#if CRYPTOGRAPHY_OPENSSL_LESS_THAN_102 && !defined(LIBRESSL_VERSION_NUMBER)
int (*SSL_CTX_set_alpn_protos)(SSL_CTX *,