How to set up the web admin interface:

1. Install required Perl modules, e.g. on Debian/Ubuntu:

      aptitude install libdbi-perl libapache-session-perl libdbd-pg-perl

2. Create the Postgres ITKACL database, using itkacl.sql from the
   core distribution:

     createdb itkacl
     psql itkacl < itkacl.sql

3. Roots must be added manually, e.g.:

     echo "INSERT INTO objects (name, description) VALUES ('web', 'WWW-based systems');" | psql itkacl

4. Create a separate database for holding the sessions
   (see perldoc Apache::Session::Store::Postgres):

     createdb itkacl-sessions
     echo 'CREATE TABLE sessions ( id char(32) not null primary key, a_session text )' | psql itkacl-sessions

5. Create a user for itkacl-web and give it full access:

     createuser --pwprompt itkacl-web
     echo 'GRANT SELECT, INSERT, UPDATE, DELETE ON objects TO "itkacl-web";' | psql itkacl
     echo 'GRANT SELECT, UPDATE ON objects_id_seq TO "itkacl-web";' | psql itkacl
     echo 'GRANT SELECT, INSERT, UPDATE, DELETE ON aclentries TO "itkacl-web";' | psql itkacl
     echo 'GRANT SELECT, INSERT, UPDATE, DELETE ON sessions TO "itkacl-web";' | psql itkacl-sessions

   You could use a separate session username if you wish, although there's
   probably not point.

6. Set up an include/config.local.pm file. It will probably look very much like
   include/config.pm, except without the eval part, and with your own values
   for password etc. filled in. Remember to chmod so that it is only readable
   by the web server.

7. Make a vhost in Apache (or any other web server supporting CGI), with the web/
   directory as the DocumentRoot, index.pl as the DocumentIndex, and .pl enabled
   as CGI scripts.

8. Go to your vhost, and administer to your heart's content.