Taint: de-taint $2 (fixed part of key) from a matching partial-search

[exim.git] / doc / doc-docbook / spec.xfpt

diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt
index 1921a29e4fa4878e81f4a51482e49ad7f4f49ece..e9aa9cdfe6646923661bc7bcb7d6b22a558175bf 100644 (file)
--- a/doc/doc-docbook/spec.xfpt
+++ b/doc/doc-docbook/spec.xfpt
@@ -7349,6 +7349,11 @@ dot-separated components; a key such as &`*fict.example`&
 in a database file is useless, because the asterisk in a partial matching
 subject key is always followed by a dot.
 
+When the lookup is done from a string-expansion,
+the variables &$1$& and &$2$& contain the wild and non-wild parts of the key
+during the expansion of the replacement text.
+They return to their previous values at the end of the lookup item.
+