Cygwin: doc: fix description of new "env" schema for /etc/nsswitch.conf

Fixes: 27376c60a9 ("Allow deriving the current user's home directory via the HOME variable")
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

winsup/doc/ntsec.xml

@@ -1167,7 +1167,7 @@ and on non-AD machines.
 </para>
 
 <para>
-Four schemata are predefined, two schemata are variable.  The predefined
+Five schemata are predefined, two schemata are variable.  The predefined
 schemata are the following:
 </para>
 
@@ -1205,14 +1205,10 @@ schemata are the following:
   </varlistentry>
   <varlistentry>
     <term><literal>env</literal></term>
-    <listitem>Derives the home directory of the current user from the
-	      environment variable <literal>HOME</literal> (falling back to
-	      <literal>HOMEDRIVE\HOMEPATH</literal> and
-	      <literal>USERPROFILE</literal>, in that order).  This is faster
-	      than the <term><literal>windows</literal></term> schema at the
-	      expense of determining only the current user's home directory
-	      correctly.  This schema is skipped for any other account.
-	      </listitem>
+    <listitem>Utilizes the user's environment.  This schema is only supported
+	      for setting the home directory yet.
+	      See <xref linkend="ntsec-mapping-nsswitch-home"></xref> for
+	      the description.</listitem>
   </varlistentry>
 </variablelist>
 
@@ -1352,7 +1348,7 @@ of each schema when used with <literal>db_home:</literal>
 	      environment variable <literal>HOME</literal> (falling back to
 	      <literal>HOMEDRIVE\HOMEPATH</literal> and
 	      <literal>USERPROFILE</literal>, in that order).  This is faster
-	      than the <term><literal>windows</literal></term> schema at the
+	      than the <literal>windows</literal> schema at the
 	      expense of determining only the current user's home directory
 	      correctly.  This schema is skipped for any other account.
 	      </listitem>