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workaround bash 4.2- not having unset A[-1] support
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@ -1915,8 +1915,9 @@ if (( $# < 1 )); then
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fi
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PARAMS=("$@")
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TARGET=${PARAMS[-1]}
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unset PARAMS[-1]
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last_element="$(( $# - 1 ))"
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TARGET=${PARAMS[$last_element]}
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unset PARAMS[$last_element]
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# Refuse to proceed if the hostname starts with a hyphen, since hostnames can't
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# begin with a hyphen and this likely means we accidentally parsed an option as
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