IDMAP: Man change for ldap_idmap_range_size option
Resolves:
https://fedorahosted.org/sssd/ticket/2922
Reviewed-by: Nathaniel McCallum <npmccallum@redhat.com>
Reviewed-by: Michal Židek <mzidek@redhat.com>
(cherry picked from commit d9de4b26f44a344025bbfa23104b7b67935fae35)