simple patch for portsnap to use wget

[Luca Ferrari]

I did a little review and now it is possible to specify to use wget or
not using the portsnap.conf file, as well as the option to ingore
certificate checking even if I don't believe this is correct.
Therefore portsnap with this patch could work with either wget or
phttpget, even if I'm not able to test if the laminating is still
correct for phttpget (someone could test please?).

Regards,
Luca
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