Shifted glob functionality under @{00-core}.

Early-time parcel @{00-core} now hosts a variety of glob functionality,
as required for sane calling conventions. A host of glob functions have
newly arisen, including is_file_text_matches_glob() and
get_file_text_substring_matching_glob_group_if_found(), whose
functionality is fairly straightforward.

"So spake we all,
 Unthanked in the rakish, clanging dark,
 Clinging twofold by the
 Ferrous blight of
 Yesteryear in
 Shackles' fear unlimbered –
 Feral under dawn-simpered umber."
Slightly improved file globbing nomenclature.