modif and added several scipts for testing cgi

+ modif html page for script tests
+ script output not added to response in case of http error

srcs/cgi-bin/cgi_cpp_len_small.cpp

@@ -0,0 +1,20 @@
+
+# include "cgi_utils.hpp"
+
+int main (int ac, char **av, char ** env)
+{
+	std::string                                 http_header;
+	std::string                                 http_body;
+
+	(void)ac;
+	(void)av;
+
+	fill_response_basic(env, http_body, http_header);
+
+	http_header += "Content-Length: " + itos(http_body.size() - 100);
+
+	std::cout << http_header << CRLF CRLF << http_body;
+
+	return 0;
+}
+