hv(at)tbz-pariv(dot)de writes:
> For easier deployment it would be nice to have an include_dir directive in
> pg_hba.conf.
This doesn't seem like a remarkably good idea from here, mainly because
entries in pg_hba.conf are critically order-dependent. Dropping random
entries into a conf.d-like directory could produce unexpected results
--- and in this case, "unexpected result" probably means "security
failure".
regards, tom lane