You misspelled more secure, flexible, correct, extensible, and robust. And your CGI-fu is…

print CGI->header; # …is just fine.
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CGI.pm/cgi-lib.pl may have given the web to Perl, for all of like five years, but it is also what took the web away from Perl. Vanilla CGI was untenable as an app deployment layer, especially in shared hosting environments, and mod_perl was too difficult and hardwired to the webserver, trebly in shared hosting environments. There is a difference between negativity and objectivity.