parse_debian_interfaces avoid unbound variables errors
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@ -67,7 +67,7 @@ parse_debian_interfaces() {
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local filename="${1}" # path to interfaces file
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local interface="${2}" # interface name
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local addrtype="${3}" # inet or inet6
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local found=false address prefix gateway
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local found=false address= prefix= gateway=
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local kw args
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while read kw args; do
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if ! ${found}; then
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