m4_define(<:RENAME_HEADERS_REMOVE:>, <:m4_dnl
CLRSEP<::>FOREACH(<:SEP(:)$:><:1:>, <:$1:>):>)
+## WARNING_HEADER(tag, msg)
+##
+## Add a warning header to the current mesage.
+m4_define(<:WARNING_HEADER:>,
+<:add_header = X-CONF_header_token-Warning: $1 $2:>)
+
## LOOKUP_DOMAIN(dom, [if-found], [if-not-found])
##
## Look up DOM in the master domains file. If it's found, put the