named.service: Update for bind 9.20.0 installation path

bind version 9.20.0 has been installed into /package/dns/bind-9.20.0-0.
The old version 9.9.6-P1 is in /package/dns/2014-12-03.

Update path to new version.

Update config file name as well which has been moved into
/package/dns/etc.

Use expanded local path so that named startup doesn't depend on
automounter.

etc/systemd/system/named.service

@@ -4,7 +4,7 @@ ConditionHost=wtf.molgen.mpg.de
 [Service]
 Type=forking
 ExecStartPre=-/sbin/ip addr add 141.14.16.1/20 dev net03
-ExecStart=/package/dns/2014-12-03/sbin/named -4 -c /package/dns/2014-12-03/etc/named.conf
+ExecStart=/amd/wtf/1/package/dns/bind-9.20.0-0/sbin/named -4 -c /amd/wtf/1/package/dns/etc/named.conf
 ExecStopPost=-/sbin/ip addr del 141.14.16.1/20 dev net03
 
 [Install]