To make sure that e.g. the short/NetBIOS domain name is available this
patch make sure that the responders send a get_domains request to their
backends at startup the collect the domain information or read it from
the cache if the backend is offline.

For completeness I added this to all responders even if they do not need
the information at the moment.

Fixes https://fedorahosted.org/sssd/ticket/1951

--missing arguments.
--format '%s', but argument is integer.
--wrong format string, examle: '%\n'

Two new calls are added to allow to add SID based lookups to the
negative cache.

This new call is similar to responder_get_domain() but uses the domain
SID as search parameter. Since the length of the stored domain SID is
used in the comparison, SIDs of users and groups and be used directly
without stripping the RID component.

The functionality is not merged into responder_get_domain() to allow to
calculate the timeout correctly and return a specific error code if the
entry is expired.

The patch adds two new request types for SID related requests. The first
one is used if a SID is given and the corresponding object should be
found. The second one can be used if the SID for an object is requested
but it is not clear if the object is a user or a group.

This patch add a new filter type to the data-provider interface which
can be used for SID-based lookups.

The current timout calculation code in responder_get_domain() is flawed
and I think it always was. I removed the related code because
- it currently has no effect, a match is returned even if it is expired
- that callers do not have any code to handle expired domains.

Recent refactoring introduced to concept of disabled domains, i.e.
domains which does not exists anymore. responder_get_domain() should not
return disabled domains.

Recent refactoring removed the need to copy the domain info data of
sub-domains because the related objects will not be removed from memory
anymore.