forcibly reinstall one port with portmaster

[Miroslav Lachman]

How can I reinstall just one port without version change?

If I did portmaster -f mod_python-3.3.1, portmaster reinstall all 
dependencies.
===>>> The following actions were performed:
         Re-installation of python25-2.5.2_1
         Re-installation of libtool-1.5.24
         Re-installation of libiconv-1.11_1
         Re-installation of gettext-0.16.1_3
         Re-installation of gmake-3.81_2
         Re-installation of m4-1.4.9,1
         Re-installation of perl-5.8.8_1
         Re-installation of p5-gettext-1.05_1
         Re-installation of help2man-1.36.4_1
         Re-installation of autoconf-wrapper-20071109
         Re-installation of autoconf-2.61_2
         Re-installation of expat-2.0.0_1
         Re-installation of apache-2.2.8
         Re-installation of mod_python-3.3.1

(if this is expected behaviour, could it be better documented in man page?)

Miroslav Lachman