update info about field_allow_config

diff --git a/doc/plugins/contrib/field.mdwn b/doc/plugins/contrib/field.mdwn
index dce2d891c9083c9da9e24a2ecadf41ab32a3214a..e57f91362ec4742abc4d9de8d74cef4c3cd27d0c 100644 (file)
--- a/doc/plugins/contrib/field.mdwn
+++ b/doc/plugins/contrib/field.mdwn
@@ -54,7 +54,7 @@ The following options can be set in the ikiwiki setup file.
     field_allow_config => 1,
 
 Allow the $config hash to be queried like any other field; the 
-keys of the config hash are the field names.
+keys of the config hash are the field names, with a prefix of "CONFIG-".
 
 **field_register**