install.c: please set unlink_dest_before_opening=false

[Robert Millan [ackstorm]]

Hi,

install --help says it will just "copy SOURCE to DEST", so one would
expect to behave like cp and not break hard links.

However, because unlink_dest_before_opening is set to true, this will
break links.  Unless you notice about this, it's quite a problem when
you do something like:

  install -s ./fubar /big_template_for_building_chroots/usr/bin/fubar

and find that /big_template_for_building_chroots/usr/bin/fubar no
longer has a gazillon of links to all your chroots :-)

I haven't checked POSIX though, but if this is actualy a requirement
maybe a POSIX_ME_HARDER hack would make sense here?

Thanks

-- 
Robert Millan

ACK STORM, S.L.  -  http://www.ackstorm.es/

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