New preference code and SQL

[Jon Parise]

Note that if you're using an SQL database to store your preferences,
you'll need to update the schema to match the following:

    create table horde_prefs (
        uid             char(32) not null,
        scope           char(16) not null default '',
        pref_name       char(32) not null,
        pref_value      text null,
        primary key (uid, scope, pref_name)
    );

-- 
Jon Parise (jon@csh.rit.edu)  .  Rochester Inst. of Technology
http://www.csh.rit.edu/~jon/  :  Computer Science House Member