updating docs for new 'map to guest' option and missing 'enable asu support' option

docs/smbdotconf/protocol/enableasusupport.xml

@@ -0,0 +1,17 @@
+<samba:parameter name="enable asu support"
+                 context="G"
+                 advanced="1" developer="1"
+		 type="boolean"
+                 xmlns:samba="http://www.samba.org/samba/DTD/samba-doc">
+<description>
+    <para>Hosts running the "Advanced Server for Unix (ASU)" product 
+    require some special accomodations such as creating a builting [ADMIN$] 
+    share that only supports IPC connections.  The has been the default
+    behavior in smbd for many years.  However, certain Microsoft applications
+    such as the Print Migrator tool require that the remote server support
+    an [ADMIN$} file share.  Disabling this parameter allows for creating 
+    an [ADMIN$] file share in smb.conf.</para>
+</description>
+
+<value type="default">yes</value>
+</samba:parameter>

docs/smbdotconf/security/maptoguest.xml

@@ -43,6 +43,13 @@
 	    <emphasis>hate</emphasis> you if you set the <parameter moreinfo="none">map to 
 	    guest</parameter> parameter this way :-).</para>
 	</listitem>
+	<listitem>
+	    <para><constant>Bad Uid</constant> - Is only applicable when Samba is configured
+	    in some type of domain mode security (security = {domain|ads}) and means that
+	    user logins which are successfully authenticated but which have no valid 
+	    user account (and smbd is unable to create one) should be mapped to the defined
+	    guest account.  This was the default behavior of Samba 2.x releases.</para>
+	</listitem>
     </itemizedlist>
 
     <para>Note that this parameter is needed to set up &quot;Guest&quot;