NAME
       cgi_error  - display an error string to the user
SYNOPSIS
       #include <cgi/cgi.h>
       void cgi_error (CGI *cgi, const char *fmt, ...)
                       ATTRIBUTE_PRINTF(2,3);
ARGUMENTS
       cgi - a pointer to a CGI struct
       fmt - printf style format string and arguments
DESCRIPTION
       cgi_error  will  output  a  500  error  containing  the specified error
       message.  This function is likely to be removed from future versions in
       favor of a user error mechanism.
RETURN VALUE
       None
SEE ALSO
       cgi_debug_init(3),   cgi_parse(3),   cgi_destroy(3),  cgi_js_escape(3),
       cgi_html_escape_strfunc(3),  cgi_register_strfuncs(3),   cgi_output(3),
       parse_rfc2388(3),  cgi_url_validate(3), open_upload(3), cgi_cs_init(3),
       cgi_url_escape_more(3),  cgi_html_strip_strfunc(3),   cgi_neo_error(3),
       cgi_redirect(3),      cgi_filehandle(3),      cgi_register_parse_cb(3),
       cgi_url_escape(3),          cgi_init(3),           cgi_redirect_uri(3),
       cgi_cookie_clear(3),       cgi_url_unescape(3),       cgi_vredirect(3),
       cgi_display(3), cgi_html_ws_strip(3), cgi_error(3),  cgi_cookie_set(3),
       cgi_text_html_strfunc(3), cgi_cookie_authority