X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~mdw/git/exim-config/blobdiff_plain/285fc90e0acea923ffd75380e74e7199e48bb176..1e5ccd7c52be79d1de45691a0bb46cbb1a686bf0:/defs.m4

diff --git a/defs.m4 b/defs.m4
index 8ece5d4..370c2d3 100644
--- a/defs.m4
+++ b/defs.m4
@@ -112,6 +112,13 @@ m4_ifdef(<:_done:$1/$2:>, <::>, <:m4_dnl
 m4_ifdef(<:_head:$1/$2:>, <:<:##:> m4_indir(<:_head:$1/$2:>)
 :>)m4_define(<:_done:$1/$2:>):>):>):>)
 
+## ADD_HEADER(hdrs)
+##
+## An ACL action to add the given HDRS, which are a `\n'-terminated list of
+## new header lines.
+m4_define(<:ADD_HEADER:>, <:m4_dnl
+ set	acl_m_hdradd = ${if def:acl_m_hdradd{$acl_m_hdradd}{}}$1\n:>)
+
 ## RENAME_HEADERS_ADD(list)
 ##
 ## Return a newline-separated list of message header additions of the form