mpd.service

<?xml version="1.0" standalone='no'?>
<!DOCTYPE service-group SYSTEM "avahi-service.dtd">
<service-group>
   <name replace-wildcards="yes">%h (MPD)</name>
   <service>
       <type>_mpd._tcp</type>
       <port>6600</port>
   </service>
 <service>
 <type>_device-info._tcp</type>
 <port>0</port>
 <txt-record>model=Xserve</txt-record>
</service>
</service-group>

smb.service

<?xml version="1.0" standalone='no'?>
<!DOCTYPE service-group SYSTEM "avahi-service.dtd">
<service-group>
   <name replace-wildcards="yes">%h (Samba)</name>
   <service>
       <type>_smb._tcp</type>
       <port>445</port>
   </service>
<!--   <service>
       <type>_smb._tcp</type>
       <port>139</port>
   </service>-->
 <service>
 <type>_device-info._tcp</type>
 <port>0</port>
 <txt-record>model=Xserve</txt-record>
</service>
</service-group>