Add DNS template for no self-hosted mail scenarios

#357

install/deb/templates/dns/default-nomail.tpl

@@ -0,0 +1,11 @@
+ID='1' RECORD='@' TYPE='NS' PRIORITY='' VALUE='%ns1%.' SUSPENDED='no' TIME='%time%' DATE='%date%'
+ID='2' RECORD='@' TYPE='NS' PRIORITY='' VALUE='%ns2%.' SUSPENDED='no' TIME='%time%' DATE='%date%'
+ID='3' RECORD='@' TYPE='NS' PRIORITY='' VALUE='%ns3%.' SUSPENDED='no' TIME='%time%' DATE='%date%'
+ID='4' RECORD='@' TYPE='NS' PRIORITY='' VALUE='%ns4%.' SUSPENDED='no' TIME='%time%' DATE='%date%'
+ID='5' RECORD='@' TYPE='NS' PRIORITY='' VALUE='%ns5%.' SUSPENDED='no' TIME='%time%' DATE='%date%'
+ID='6' RECORD='@' TYPE='NS' PRIORITY='' VALUE='%ns6%.' SUSPENDED='no' TIME='%time%' DATE='%date%'
+ID='7' RECORD='@' TYPE='NS' PRIORITY='' VALUE='%ns7%.' SUSPENDED='no' TIME='%time%' DATE='%date%'
+ID='8' RECORD='@' TYPE='NS' PRIORITY='' VALUE='%ns8%.' SUSPENDED='no' TIME='%time%' DATE='%date%'
+ID='9' RECORD='@' TYPE='A' PRIORITY='' VALUE='%ip%' SUSPENDED='no' TIME='%time%' DATE='%date%'
+ID='10' RECORD='www' TYPE='A' PRIORITY='' VALUE='%ip%' SUSPENDED='no' TIME='%time%' DATE='%date%'
+ID='11' RECORD='ftp' TYPE='A' PRIORITY='' VALUE='%ip%' SUSPENDED='no' TIME='%time%' DATE='%date%'