* DONE Email::Valid does not accept UTF-8 emails adresses (e.g., peace@☮.net).
LDAP doesn't allow UTF-8 in the DNs anyway, so maybe convert the
domains/emails to Punycode internally?

* TODO What to do when a user wants to add a domain? Is it worth it to send a confirmation e-mail?

* DONE Better check for existing lists (commands).
- When adding a new alias/mailbox 'test', check for existing alias/mailbox 'test', and list 'test'.
- When adding a new alias/mailbox 'test-request', check for existing alias/mailbox 'test-request', list 'test-request' *and* list 'test'. (The same for other list commands.)
- When adding a new list 'test', check for existing alias/mailbox/list 'test', 'test-request',...
- (Lists of the form 'test-request' are forbidden);

* CANCELED Check for cycles when creating new aliases?
CLOSED: [2012-09-29 Thu 16:12]
- CLOSING NOTE [2012-09-29 Thu 16:12] \\
1/ It is impossible to do it properly since the authenticated user may not have full read access on the graph.
2/ Cycles may also be created by catch-alls or mailbox forwarding, or even externally with another server.
3/ Postfix warns the administrator with a
"unreasonable virtual_alias_maps map nesting for test-loop1@fripost.org"
in the logs if there's a loop in the alias resolution.

* DONE Write a script to check every runmode against the W3 validator.
(Cf. cgiapp_postrun);

* DONE Use FastCGI. References
- http://www.cgi-app.org/index.cgi?FastCGI
- http://stackoverflow.com/questions/11771564/nginx-fastcgi-configuration-for-cgiapplication-app

* TODO Use HTML::Template::Pro. Not sure it's really worth it, though.

* DONE Escape reserved characters in URLs:
http://mark.stosberg.com/blog/2010/12/percent-encoding-uris-in-perl.html

* CANCELED How should we encode the URL for internationalized domain names? Punicode vs. unicode vs. HTML entities?
CLOSED: [2012-09-27 Thu 00:03]
- CLOSING NOTE [2012-09-27 Thu 00:03] \\
It's up to the browser (Firefox supports unicode in URLs).

* CANCELED Forbid UTF8 in the domain part of lists? (Test if the list
managers support it at least.)
CLOSED: [2012-09-27 Thu 03:38]
- CLOSING NOTE [2012-09-27 Thu 03:38] \\
Mailman and Schleuder do not support IDNs, but we convert the list name
into punicode first.

* DONE Give the right for domain postmasters to grant the right
to create aliases and lists.

* TODO Give the right to appoint co owners (for list and aliases).

* TODO Make every service use Kerberos, and remove the passphrase on
their GPG private keys.

* DONE Check list names against mailman's and schleuder's regexps?

* TODO What to do when a list creation fails? Set up a new service
to clean out the pending lists and domains if they have not been fixed
within 24h (daemon).

* TODO Automatically generated passwords.