[pkg-horde] Bug#755187: Workaround

[Ville Nummela]

I don't have time and/or motivation to create a proper fix for this. I  
did create a workaround though: in  
/usr/share/horde/kronolith/lib/Driver/Sql.php function getByUID() I  
just commented out the "Optionally filter by calender" part. Now, this  
obviously breaks filtering by calendar, but I only use one calendar  
anyway so that's not a problem for me.

For a real fix, it should be investigated why the $calendars ends up  
being a list of commas and spaces.