[dev] @include instead of include

[steve]

I don't get why we should use @include
It happens to me, but it can happen to others, it hides errors

Here is a patch ro move some from lib/Auth.php

diff -w -b -r1.105 Auth.php
179c179
<             @include_once HORDE_BASE . '/config/hooks.php';
---
 >             include_once HORDE_BASE . '/config/hooks.php';
206c206
<             @include_once HORDE_BASE . '/config/hooks.php';
---
 >             include_once HORDE_BASE . '/config/hooks.php';