positive check when linked to /dev/null (dummy rte)
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This merge request is automatically copied from !644 (merged) orginally made by @andrii
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```
[manf@F302 arc-git]$ test -f /tmp/file && echo yes
yes
[manf@F302 arc-git]$ test -e /tmp/file && echo yes
yes
[manf@F302 arc-git]$ test -f /tmp/null && echo yes [manf@F302 arc-git]$ test -e /tmp/null && echo yes yes
[manf@F302 arc-git]$ test -e /tmp/broken && echo yes [manf@F302 arc-git]$ test -f /tmp/broken && echo yes