cohost support

Was looking at `css crimes`:

https://cohost.org/rc/tagged/css%20crimes

Clicked on the the `css crimes` tag in an individual post.

Got directed to something that encoded the percent symbol:

https://cohost.org/rc/tagged/css%2520crimes

Seeing reports that this applies to things beyond tags.

https://cohost.org/wave/post/782352-cohost-regression-e

Seems resolved per:

https://cohost.org/confusedcharlot/post/783018-this-seems-odd#comment-487c87eb-69db-4cc0-86df-b2ecc11133cd