D1472/rP22083 grouped all civbonus technologies in a single civbonuses/ folder.
D1775/rP23770 deleted unused technologies that were deprecated years ago.
Special technologies are technologies that have a "civ": or "notciv": requirement, i.e. they're available to one or more factions, but not all. Currently some are grouped alongside regular technologies, others are arbitrarily distibuted over the carthaginians/, hellenes/, kushites/, persians/, romans/, and successors/ subdirectories.
This patch moves special technologies out of those subdirectories, occassionally implementing more consistent naming, and updates the relevant templates accordingly.