How To clean up ports....

["Milhomem, Marcus" <Marcus_Milhomem_(_at_)_bmc_(_dot_)_com>]

Hi,
   I saw that after installing anything using ports, we stay if all the
source code and other configuration files inside ports tree. So I would like
to know, how to clean this up, so I can keep my ports tree clean again after
the instalation of any file?



Thanks
Marcus Renaud Milhomem