-
-/*
-XXX looks like $0 may be usable
-XXX could add setting of *valueptr to all the OK returns; seems doable here, the Q
- is: what effect would it have at config-file level. domain_data & local_part_data
- would get filled in... might anyone be checking it for emptiness? I think the docs
- do not say "will be empty otherwise", so that seems ok.
-XXX WORRY: we get new caching of named-list match results. Is that cache checked
- for the key being matched?
-XXX could also add $0 fill-in with the matching text for pattern? RE already has it,
- tailmatch already has it, @[] => dotted.quad.etc, @mx => h->address ?
-*/