[horde] only first initialization of preferences via hooks

[Michael M Slusarz]

Quoting Steffen <skhorde at smail.inf.fh-bonn-rhein-sieg.de>:

> how do I initialize preferences of users via hooks, but then keep my  
> hands off them for later logins? I use: horde 5.1.5 stable

Explicitly save the value to the prefs backend - $prefs->setValue() -  
before returning the value from the hook.

michael
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Michael Slusarz [slusarz at horde.org]