Plugin searches should force to lowercase

[jonoaldersonwp]

Plugin searches like ​https://wordpress.org/plugins/search/Cats/ support mixed-case URLs.

The search form submission/handling process should return a lowercase URL, and, direct requests to mixed-cased URLs here should be forced to lowercase via a 301 redirect.

[dd32]

Changing this would be of detriment to end-users, and complicated for non-ascii languages

[jonoaldersonwp]

If you're concerned about the input box and H1 contents, then we could add some additional complexity to the ticket to address - we could de-couple the search query and how it's (re)presented to the user from the slug; maintaining the former, and forcing the latter to lowercase.