Make completion sorting order configurable * Use allocated plain array for categories * Use callbacks for dynamic completions (private for now) * Add compl_set_flags() to allow user to set completion order * Bump api to 24-24

[Desktop Entry]
Encoding=UTF-8
Type=Application
Name=MCabber
GenericName=Jabber IM Client
Comment=Console Jabber Client
Exec=mcabber
Terminal=true
Categories=ConsoleOnly;System;Network;InstantMessaging;Chat;