RPM postmaster -i ?

The docs say to startup, using postmaster -i (Internet?) switch - for TCP/IP
use. They don't elaborate on where to properly implement postmaster -i.

Some of the places, I've uncovered where one *might* invoke postmaster -i
are:
/etc/tc.d/init.d/postgresql
pg_ctl
pg_hba.conf
CMDNAME

Maybe I'm missing something, but it seems like PostgreSQL won't even work
from another PC without postmaster -i ? If so, I'm amazed at how vague the
docs are, regarding the proper place to implemement postmaster -i. The docs
seem to assume that one is going to *manually* start PostgreSQL, rather than
auto-start it upon boot. I'm also surprised that the RPM installation
doesn't setup postmaster -i.

Thanks for whatever light you might shed on this. It's been a several-days
hunt, already - to find out.

Michael Coughlin