+# previously, I was checking to see if the new mail host
+# is on my home network, then changing my home dns
+# to resolve on the local network, so that I didnt
+# have to send traffic out to the internet or rely
+# on that. However, that breaks for a laptop that roams.
+# So, we could have a cronjob that updates that dns,
+# however, another solution is to just use ipv6,
+# and I prefer that.
+#
+# TODO: enable ipv6 for email. exim config setting disables it.
+# need to add vpn support. need to add firewall / routing.
+# I think exim will try ipv6 first, so no need to disable
+# ipv6 i think.
+
+m $old_shell /a/exe/primary-setup $new_hostname