Use lower-case name for case-insensitive searches
    
    The patch makes sure that a completely lower-cased version of a fully
    qualified name is used for case insensitive searches. Currently there
    are code paths where the domain name was used as configured and was not
    lower-cased.
    
    To make sure this patch does not break with old entries in the cache or
    case sensitive domains a third template was added to the related filters
    templates which is either filled with a completely lower-cased version or
    with the old version. The other two template values are unchanged.