unicode in URLs

[Pomax]

Hi, knox had a problem with unicode in URLs that got fixed in Automattic/knox@6f2ad0d that I think mox might also be suffering from, where unicode characters in URLs are not getting escaped correctly, leading to an illegal URL when trying to store them.

Will you put the changes into a pull request?

[Pomax]

if I have time. Kind of working on 20ish projects, so it might be a while