Allow folloing 302 codes in FETCH_ARGS in bsd.port.mk

[Baptiste Daroussin]

Hi,

What about removing the -A option from FETCH_ARGS to allow fetch to
follow 302 code.

It causes trouble when using some authenticated proxies.
It also causes troubles with github which is more and more used. Lots
of projects on github doesn't provides distfiles, they rely on git
tags automatically presented as distfiles, they only way to fetch them
is to follow 302 codes, the workaround is to ask developpers to
provide distfiles.

regards,
Bapt