SSL: fixed build with OPENSSL_NO_DH.

src/event/ngx_event_openssl.c

@@ -1315,6 +1315,8 @@ ngx_ssl_passwords_cleanup(void *data)
 ngx_int_t
 ngx_ssl_dhparam(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *file)
 {
+#ifndef OPENSSL_NO_DH
+
     BIO  *bio;
 
     if (file->len == 0) {
@@ -1385,6 +1387,8 @@ ngx_ssl_dhparam(ngx_conf_t *cf, ngx_ssl_t *ssl, ngx_str_t *file)
 
     BIO_free(bio);
 
+#endif
+
     return NGX_OK;
 }
 

src/event/ngx_event_openssl.h

@@ -19,7 +19,9 @@
 #include <openssl/bn.h>
 #include <openssl/conf.h>
 #include <openssl/crypto.h>
+#ifndef OPENSSL_NO_DH
 #include <openssl/dh.h>
+#endif
 #ifndef OPENSSL_NO_ENGINE
 #include <openssl/engine.h>
 #endif