Initialize the server name
Apparently it's the "realname"
Add a strtoul() wrapper
Load an MOTD on start
Load X/Open message catalogs

This is going to enable making changes to ERR and RPL messages without
modifying the source code.

Localized messages could be interesting. :)
Put a prolog at the top of configuration files

Later I'm going to put in there some more information about the format etc.
Miscellaneous little things
Don't forget that channels have users
Add support for custom str_map key comp. fun.

That wasn't hard.
Implement client registration

And shuffle around some functions so that they form logical blocks (at least
I've tried; it's not that easy when you try to avoid forward declarations).