Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.
Baxon, let me know when you know about this. I like to know too, where I can change that.
I would think that you can go to the data/db/Building_factionwide_effects_juctions_table and export the tsv, then add sArmy2_barracks agent_cap_general # (this can be what ever # you wish)
This should work.
dont forget to save, open new mod, import saved Building_factionwide_effects_juctions_table TSV file, and save your new mod.