Responders: Make the client context more generic This is useufl to allow reusing the responder code with other protocols. Store protocol data and responder state data behind opaque pointers and use tallog_get_type to check they are of the right type. This also allows to store per responder state_ctx so that, for example, the autofs responder does not have to carry useless variables used only by the nss responder. Resolves: https://fedorahosted.org/sssd/ticket/2918 Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>

RESPONDERS: Negative caching of local users This patch adds new option 'neg_cache_locals_timeout' into section of NSS responder. It allows negative caching of local groups and users. Default value is 0 which means no caching. Resolves: https://fedorahosted.org/sssd/ticket/2928 Reviewed-by: Pavel Březina <pbrezina@redhat.com>

RESPONDERS: Negcache in resp_ctx preparing Preparation for initialization of negative cache in common responder. Reviewed-by: Pavel Březina <pbrezina@redhat.com>

TESTS: Split a separate common_mock_resp_dp module Splitting the module would allow responders that test the Data Provider requests to use the mock_rctx/mock_cctx functions without duplicate definitions. Reviewed-by: Pavel Březina <pbrezina@redhat.com>

CMocka based test for the NSS responder