Comment 2 for bug 316258

Detail output from Synaptic:

Setting up wu-ftpd (2.6.2-30ubuntu1) ...
--------- IMPORTANT INFORMATION FOR XINETD USERS ----------
The following line will be added to your /etc/inetd.conf file:

#<off># ftp\t\tstream\ttcp\tnowait\troot\t/usr/sbin/tcpd\t/usr/sbin/wu-ftpd -l

If you are indeed using xinetd, you will have to convert the
above into /etc/xinetd.conf format, and add it manually. See
/usr/share/doc/xinetd/README.Debian for more information.
Suggested entry (automatically converted using itox):

-----------------------------------------------------------

dpkg: error processing wu-ftpd (--configure):
 subprocess post-installation script returned error exit status 20
Errors were encountered while processing:
 wu-ftpd
E: Sub-process /usr/bin/dpkg returned an error code (1)
A package failed to install. Trying to recover:
Setting up wu-ftpd (2.6.2-30ubuntu1) ...
--------- IMPORTANT INFORMATION FOR XINETD USERS ----------
The following line will be added to your /etc/inetd.conf file:

#<off># ftp\t\tstream\ttcp\tnowait\troot\t/usr/sbin/tcpd\t/usr/sbin/wu-ftpd -l

If you are indeed using xinetd, you will have to convert the
above into /etc/xinetd.conf format, and add it manually. See
/usr/share/doc/xinetd/README.Debian for more information.
Suggested entry (automatically converted using itox):

-----------------------------------------------------------

dpkg: error processing wu-ftpd (--configure):
 subprocess post-installation script returned error exit status 128