[dev] default backends

[Ronan SALMON]

> commit a0c1ee118b71c24b4ecb12da20606822490992ec
> Author: Jan Schneider <jan at horde.org>
> Date:   Sat Feb 12 18:43:18 2011 +0100
>
>    Provide default backends.php where it makes sense. Add configuration
>    options to allow administrators to pick the backends to use.

IMHO, there is no need for a configuration options to allow  
administrators to pick the backends to use. It is much simpler for an  
admin to only configure the needed backends rather than having to  
configure the one you need and then go through the GUI to disabled the  
other ones.

Looking at turba backends.php, not everyone need all backends  
configured by default and then enabled/disabled through the admin GUI,  
ie :
$cfgSources['localsql']
$cfgSources['localldap']
$cfgSources['personal_ldap']
$cfgSources['prefs']
$cfgSources['favourites']
$cfgSources['facebook']
$cfgSources['imsp']
$cfgSources['kolab_global']
$cfgSources['kolab']

This configurations should be provided as examples (commented out),  
except localsql ? If someone need any one of them, then they can be  
configured thought backends.local.php.

this should avoid errors and speed login process.

Ronan