Problem: Cannot browse zipfiles with the unzip program found
on FreeBSD.
Solution: Adjust command arguments.
Unzip found on FreeBSD complain about missing argument with the
zipinfo modifier '-Z -1'. Joining arguments seems to work
for both implementations.
Also change `:sil!` to `:sil` so that error messages are properly
reported (per review of Christian Brabandt).
related: #15411
Signed-off-by: Damien <141588647+xrandomname@users.noreply.github.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
f0e9b72c8f
