civicrm.org website old what/whatiscivicrm redirect to explore-civicrm
I've added this redirect, thanks for reporting it!

I think it's great you've made the effort to post it somewhere we can field it, and that the end result is more important than correct process - so don't fret about not posting it on issues.civicrm.org this time. Thanks for being part of the community! You did this to benefit others in your situation, knowing you wouldn't benefit yourself, and that's priceless.

Your next step is to finish that upgrade of your old CiviCRM to a supported release ASAP 

Hop on over to https://chat.civicrm.org to discuss.