poudriere reconfigure ports options

[Lorenzo Salvadore]

> To configure particular port, say mailman:
>
> poudriere options -c mail/mailman

If what you want to do with poudriere is to test a port build, you can also
set options for one particular test only with the -c option. Using
again mailman as an example:

poudriere testport -j <your_jail> -p <your_porttree> -o mail/mailman -c

Lorenzo Salvadore.