Add strict-sni patch file.

.gitignore

@@ -2,7 +2,6 @@
 *~
 *.orig
 *.rej
-*.patch
 
 # Build files
 /objs

strict-sni-example.patch

@@ -0,0 +1,47 @@
+diff --git a/src/http/ngx_http_request.c b/src/http/ngx_http_request.c
+index 98cc8c7..0810526 100644
+--- a/src/http/ngx_http_request.c
++++ b/src/http/ngx_http_request.c
+@@ -849,7 +849,7 @@ ngx_http_ssl_servername(ngx_ssl_conn_t *ssl_conn, int *ad, void *arg)
+     servername = SSL_get_servername(ssl_conn, TLSEXT_NAMETYPE_host_name);
+
+     if (servername == NULL) {
+-        return SSL_TLSEXT_ERR_NOACK;
++        return SSL_TLSEXT_ERR_ALERT_FATAL;
+     }
+
+     c = ngx_ssl_get_connection(ssl_conn);
+@@ -864,7 +864,7 @@ ngx_http_ssl_servername(ngx_ssl_conn_t *ssl_conn, int *ad, void *arg)
+     host.len = ngx_strlen(servername);
+
+     if (host.len == 0) {
+-        return SSL_TLSEXT_ERR_NOACK;
++        return SSL_TLSEXT_ERR_ALERT_FATAL;
+     }
+
+     host.data = (u_char *) servername;
+@@ -879,7 +879,7 @@ ngx_http_ssl_servername(ngx_ssl_conn_t *ssl_conn, int *ad, void *arg)
+                                      NULL, &cscf)
+         != NGX_OK)
+     {
+-        return SSL_TLSEXT_ERR_NOACK;
++        return SSL_TLSEXT_ERR_ALERT_FATAL;
+     }
+
+     hc->ssl_servername = ngx_palloc(c->pool, sizeof(ngx_str_t));
+diff --git a/lib/openssl/ssl/statem/extensions.c b/lib/openssl/ssl/statem/extensions.c
+index 8422161dc1..675446e59f 100644
+--- a/lib/openssl/ssl/statem/extensions.c
++++ b/lib/openssl/ssl/statem/extensions.c
+@@ -998,7 +998,9 @@ static int final_server_name(SSL *s, unsigned int context, int sent)
+
+     switch (ret) {
+     case SSL_TLSEXT_ERR_ALERT_FATAL:
+-        SSLfatal(s, altmp, SSL_F_FINAL_SERVER_NAME, SSL_R_CALLBACK_FAILED);
++        s->statem.in_init = 1;
++        s->statem.state = MSG_FLOW_ERROR;
++        ssl3_send_alert(s, SSL3_AL_FATAL, altmp);
+         return 0;
+
+     case SSL_TLSEXT_ERR_ALERT_WARNING:
+