add no reply prototype (not working), CI tag support

confd/conf.d/noreply.toml.disabled

@@ -0,0 +1,7 @@
+[template]
+src = "noreply.tmpl"
+dest = "/etc/postfix/noreply"
+keys = [
+"/noreply/aliases",
+"/virtual/mailbox/domains",
+]

confd/templates/noreply.tmpl

@@ -0,0 +1,10 @@
+# "no-reply" mail aliases.
+# DO NOT edit this file, it will be overwritten.
+# Instead, set the variable NOREPLY_ALIASES
+{{ range split (getv "/noreply/aliases") " " }}
+{{ if (strings.Contains . "@") }}
+{{.}} _dev_null
+{{ else }}
+{{.}}@{{ index (split (getv "/virtual/mailbox/domains") " ") 0 }} _dev_null
+{{ end }}
+{{ end }}