Purging fai packages leaves directories behind

[Kai Schindelka]

   Hello Thomas, hello @ all,

on verification it turns out to be true that purging the FAI packages
leaves the following directories behind:

/boot/fai
/etc/fai
/usr/lib/fai
/usr/share/fai
/var/run/fai

If I understand the Debian Guides correctly, a purge should completely
remove the package, including directories and config files. It seems
that the postrm script should be extended accordingly.

Maybe it is a good idea to ask the user during the initial setup of the
package if he wants to lose his config data on purge, like it is done
with the database directory in "mysql-server".

-- 
Bye; Kai