Reading volume 2 of the rat, on page 177 it talks about setting $CGI:HEADERS_ONCE = 1
I understand this will prevent more than one header from being printed.
Why would you want to be able to print more than one header? Would that be useful in troubleshooting? I would think that if that was the only time a check to see what header you were printing, that would be the variable you set rather than the default for CGI.pm.
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