Displaying and managing sites

List of sites.
Sel - select of site.
Site URL - address of a site.
Time - duration of site checking in seconds.
Uptime - site availability, whether a site is available or not.
Forbidden - whether a site contains forbidden content or not:
  Yes - forbidden content detected;
  No - forbidden content not detected;
  N/A - it is unknown whether contains a site has forbidden content or not;;
  '-' - site is not checked for forbidden content.
Required - required content.
  Yes - required content detected;
  No - required content not detected;
  N/A - it is unknown contains whether a site has required content or not;
  '-' - site it not checked for required content.
Code - error code or site response HTTP code:
  0 - site not checked yet, state unknown;
  1 - site not responding for over 10 seconds (timeout);
  2 - site not found (hostname);
  5 - error connecting to site;
  7 - invalid site address;
  200 - site found;
  301, 302 - redirecting to another site.
Last Check - time of the latest site check.