pfctl & portsentry

On Sat, Mar 15, 2003 at 11:19:39PM -0800, Jeremy C. Reed wrote:
/_
/_The "-f" reloads rules.
/_
/_Add the pfctl "-Ta" (or "-T add") switch to add new rules.
/_

I do not see the -T switch documented in a man page anywhere.
Where can I find the documentation?

v/r
-Mike