s3-docs: Add more verbose description of "username map cache time".

1 files changed, 16 insertions, 7 deletions

diff --git a/docs-xml/smbdotconf/security/usernamemapcachetime.xml b/docs-xml/smbdotconf/security/usernamemapcachetime.xml
index 5461cb1a6c..4361b1896d 100644
--- a/docs-xml/smbdotconf/security/usernamemapcachetime.xml
+++ b/docs-xml/smbdotconf/security/usernamemapcachetime.xml
@@ -4,13 +4,22 @@
 				 type="integer"
                  xmlns:samba="http://www.samba.org/samba/DTD/samba-doc">
 <description>
-    <para>This option controls if and how long the result of the
-      <smbconfoption name="username map"/> and
-      <smbconfoption name="username map script"/> across smbds in gencache.
-      If set to non-zero, it denotes the number of seconds the output of
-      both mappings will be cached.</para>
-    <para>This option is mainly useful for heavy-weight
-      <smbconfoption name="username map script"/> scripts.</para>
+	<para>
+	Mapping usernames with the <smbconfoption name="username map"/>
+	or <smbconfoption name="username map script"/>
+	features of Samba can be relatively expensive.
+	During login of a user, the mapping is done several times.
+	In particular, calling the <smbconfoption name="username map script"/>
+	can slow down logins if external databases have to be queried from
+	the script being called.
+	</para>
+
+	<para>
+	The parameter <smbconfoption name="username map cache time"/>
+	controls a mapping cache. It specifies the number of seconds a
+	mapping from the username map file or script is to be efficiently cached.
+	The default of 0 means no caching is done.
+	</para>
 </description>
 
 <value type="default">0</value>