Because legionary is English, legionnaire is French, legionarius is Latin.
This patch renames the following files:
* art/actors/props/shields/rome_scutum_legionnaire.xml → rome_scutum_legionary.xml
* art/actors/units/romans/infantry_swordsman_c2.xml → infantry_swordsman_c_2.xml (see carthaginians)
* art/actors/units/romans/infantry_swordsman_c3.xml → infantry_swordsman_c_3.xml (ibidem)
* art/actors/units/romans/infantry_swordsman_c4.xml → infantry_swordsman_c_4.xml (ibidem)
* simulation/templates/units/rome_centurio_imperial.xml → rome_infantry_swordsman_c_4.xml (to match actor)
* simulation/templates/units/rome_legionnaire_imperial.xml → rome_infantry_swordsman_c_3.xml (idem)
* simulation/templates/units/rome_legionnaire_marian.xml → rome_infantry_swordsman_c_2.xml (idem)
It also updates the maps that use legionary units:
maps/scenarios/Cinema_Demo.xml
maps/scenarios/Miletus.xml
maps/scenarios/road demo.xml
maps/scenarios/Sandbox - Britons.xml
maps/scenarios/Sandbox - Carthaginians.xml
maps/scenarios/Sandbox - Gauls.xml
maps/scenarios/Sandbox - Romans.xml
maps/scenarios/Tropical Island.xml
maps/scenarios/We are Legion.xml
maps/skirmishes/Egypt (3v3).xml