diff -r 18869fcfbc92 -r a788cfad4cfa doc/manual.docbook
--- a/doc/manual.docbook	Wed Oct 31 13:21:37 2018 -0700
+++ b/doc/manual.docbook	Wed Oct 31 13:22:13 2018 -0700
@@ -591,6 +591,15 @@
 </itemizedlist>
 </listitem>
 <listitem>
+<para><literal>[users]</literal></para>
+<itemizedlist>
+<listitem>
+<para><literal>index</literal>: the index of the key path that contains the
+user login.  If <literal>-1</literal>, the full path is used.</para>
+</listitem>
+</itemizedlist>
+</listitem>
+<listitem>
 <para><literal>[env]</literal>: all entries in here are added to the Unix environment
 when users connect.  The keys are converted to all-upper-case. </para>
 <itemizedlist>