$NetBSD: patch-ag,v 1.36 2015/09/07 09:47:01 fhajny Exp $

* Add support for NetBSD 7.
* Only define HAS_DB if it hasn't been defined.

--- src/util/sys_defs.h.orig	2015-07-18 13:28:17.000000000 +0000
+++ src/util/sys_defs.h
@@ -45,7 +45,9 @@
 #define DEF_MAILBOX_LOCK "flock, dotlock"
 #define HAS_SUN_LEN
 #define HAS_FSYNC
+#ifndef HAS_DB
 #define HAS_DB
+#endif
 #define HAS_SA_LEN
 #define NATIVE_DB_TYPE	"hash"
 #if (defined(__NetBSD_Version__) && __NetBSD_Version__ >= 104250000)
@@ -1267,6 +1269,8 @@ extern int h_errno;
 #define DEF_SMTP_CACHE_DEMAND	0
 #endif
 
+#define RECEIVED_ENVELOPE_FROM
+
  /*
   * We're not going to try to guess like configure does.
   */