Any reasons this package is so interactive while building?

I'd suggest removing this interactive facility, and place that information
in MESSAGE file, because such interaction during build doesn't seem okay.

Everyone agree? If so, I'll PR some patches for this.

Demo:

%cd /usr/pkgsrc/parallel/glunix/
%bmake fetch
[...]
LESDIR=/usr/pkgsrc/parallel/glunix/files  _PKGSRCDIR=/usr/pkgsrc
DEPENDS="user>=20000313:../../sysutils/user perl>=5.0:../../lang/perl5"
PREFIX=/usr/pkg LOCALBASE=/usr/pkg X11BASE=/usr/X11R6 /bin/sh
/usr/pkgsrc/parallel/glunix/scripts/pre-fetch

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