add opensmtpd and ipv6tunnel hosts from krov

hosts/splintrs/etc/smtpd/smtpd.conf

@@ -0,0 +1,21 @@
+#	$OpenBSD: smtpd.conf,v 1.10 2018/05/24 11:40:17 gilles Exp $
+
+# This is the smtpd server system-wide configuration file.
+# See smtpd.conf(5) for more information.
+
+table aliases file:/etc/smtpd/aliases
+
+# To accept external mail, replace with: listen on all
+#
+pki splintrs cert "/etc/letsencrypt/live/splint.rs/fullchain.pem"
+pki splintrs key "/etc/letsencrypt/live/splint.rs/privkey.pem"
+listen on end0 tls pki splintrs
+
+#action "local" maildir alias <aliases>
+action "relay" relay backup
+
+# Uncomment the following to accept external mail for domain "example.org"
+#
+# match from any for domain "example.org" action "local"
+#match for local action "local"
+match from any for domain dmz.rs action "relay"