Redirect/rewrite trailing slash

[alexweissman]

We should consider adding a trailing slash redirect/rewrite middleware, that can be turned on/off in configuration (on by default).

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[alexweissman]

Seems to still be a problem. I know lots of folks configure this in their server config, but it would be easier if it could happen at the application level.