Fix minor spelling mistakes Merges: https://pagure.io/SSSD/sssd/pull-request/3556 Reviewed-by: Lukáš Slebodník <lslebodn@redhat.com>

KCM: Fix the per-client serialization queue Resolves: https://pagure.io/SSSD/sssd/issue/3372 Fixes a race condition between one client request adding an operation to the hash table value, which was previously a linked list of operations, while another concurrent operation would remove the last remaining linked list element through its callback. Instead, the hash table value is now a separate 'queue head' structure which is only changed in a tevent request to make sure is is not processes concurrently with adding to the queue (which is also a tevent request). Reviewed-by: Pavel Březina <pbrezina@redhat.com>

KCM: Queue requests by the same UID In order to avoid race conditions, we queue requests towards the KCM responder coming from the same client UID. Reviewed-by: Michal Židek <mzidek@redhat.com> Reviewed-by: Simo Sorce <simo@redhat.com> Reviewed-by: Lukáš Slebodník <lslebodn@redhat.com>