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* parse.HostPortorFile: return error when 0 found Return an error when we haven't found any nameservers. This is the alternative considered in #3735. It's also slighly less code to be changing. Replaces: #3741 Closes: #3741 #3735 Signed-off-by: Miek Gieben <miek@miek.nl> * Add extra test case here as well Signed-off-by: Miek Gieben <miek@miek.nl>