sdap_idmap_domain_has_algorithmic_mapping: add domain name argument
When libss_idmap was only used to algorithmically map a SID to a POSIX
ID a domain SID was strictly necessary and the only information needed
to find a domain.
With the introduction of external mappings there are cases where a
domain SID is not available. Currently we relied on the fact that
external mapping was always used as a default if not specific
information about the domain was found. The lead to extra CPU cycles and
potentially confusing debug messages. Adding the domain name as a search
parameter will avoid this.