mod_cgiはapacheがapache外のスクリプトへの橋渡し
AddType application/x-httpd-cgi .cgi #mime
AddHandler cgi-script .cgi #handler
test.cgi -> apache -> mod_cgi -> test.cgi
AddType http://httpd.apache.org/docs/2.0/ja/mod/mod_mime.html#addtype
AddHandler http://httpd.apache.org/docs/2.0/ja/mod/mod_mime.html#addhandler
ハンドラとは http://httpd.apache.org/docs/2.0/ja/handler.html
mod_cgiとは http://httpd.apache.org/docs/2.0/ja/mod/mod_cgi.html
CGIイントロダクション http://httpd.apache.org/docs/2.0/ja/howto/cgi.html