Redirects in Middleman - Questions inside!

Hello

I’m trying to redirect the following, but I couldn’t figure out what options I can use in config.rb to get these done:

How do you redirect mysite.com/index.html to mysite.com/ (or mysite.com/sub/index.html to mysite.com/sub/

How would I redirect multiple ////'s to just one slash? If you visit these urls in the browser they create duplicate versions of each.
mysite.com/sub////
mysite.com/sub/////////////

Lastly, any ideas on how to modify the canonical tag’s on individual pages? Currently those are set with the “index.php” as well.

Any suggestions would be much appreciated.

Thank you!