Run acpidump(8) at system startup and store ACPI tables in the

/var/db/acpi directory. Later sendbug(1) will use this data in
bug reports. That directory is created by mtree.
idea from and OK deraadt
OK kettenis

src/etc/mtree/4.4BSD.dist

@@ -1,4 +1,4 @@
-#	$OpenBSD: 4.4BSD.dist,v 1.289 2016/09/07 18:31:00 jmc Exp $
+#	$OpenBSD: 4.4BSD.dist,v 1.290 2016/09/27 20:18:34 rpe Exp $
 
 /set type=dir uname=root gname=wheel mode=0755
 
@@ -623,6 +623,8 @@ var
 
     # ./var/db
     db
+        acpi
+	..
         ldap			mode=0700
         ..
         ns

src/etc/rc

@@ -1,4 +1,4 @@
-#	$OpenBSD: rc,v 1.486 2016/07/10 09:08:18 rpe Exp $
+#	$OpenBSD: rc,v 1.487 2016/09/27 20:18:34 rpe Exp $
 
 # System startup script run by init on autoboot or after single-user.
 # Output and error are redirected to console by init, and the console is the
@@ -451,6 +451,11 @@ if [[ -d /var/crash ]]; then
 	savecore $savecore_flags /var/crash
 fi
 
+# Store ACPI tables in /var/db/acpi to be used by sendbug(1).
+if [[ -x /usr/sbin/acpidump ]]; then
+	acpidump -o /var/db/acpi/
+fi
+
 if [[ $check_quotas == YES ]]; then
 	echo -n 'checking quotas:'
 	quotacheck -a