increasing maximum connections in PGSQL

[Tim Kellers]

If I need to raise the maximum connections to a PostgreSQL server (v 
postgresql-server-7.4.17) on FreeBSD 6.2 -STABLE, Ineed to raise the 
available semaphores to increase connectivity.  After doing a man -k on 
sem and reading through the man pages that see relevant, I'm still 
unable to determine the correct method, though it does look like it may 
involve loading a module in /bot/loader conf.

Can anyone point me to some How-to documentation on raising this value 
to increase postgresql connections?

Thanks
Tim