$OpenBSD: patch-src_imap_main_c,v 1.2 2003/08/30 00:11:31 jolan Exp $
--- src/imap/main.c.orig	2003-05-26 10:27:13.000000000 -0500
+++ src/imap/main.c	2003-08-28 20:15:40.000000000 -0500
@@ -21,6 +21,7 @@
 
 struct ioloop *ioloop;
 unsigned int max_custom_flag_length, mailbox_check_interval;
+enum mailbox_open_flags mailbox_open_flags;
 
 static struct module *modules;
 static char log_prefix[128]; /* syslog() needs this to be permanent */
@@ -130,6 +131,9 @@ static void main_init(void)
 	mailbox_check_interval = str == NULL ? 0 :
 		(unsigned int)strtoul(str, NULL, 10);
 
+	mailbox_open_flags = getenv("MMAP_INVALIDATE") != NULL ?
+		MAILBOX_OPEN_MMAP_INVALIDATE : 0;
+
 	client = client_create(hin, hout, storage);
 
         o_stream_cork(client->output);