Fix URL-encoded slashes in topic names #177
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Description
Technically, if your query parameter includes a
/, it's supposed to be URL-encoded as%2F. I started using a library that makes this mandatory in my UI codebase, so web_video_server stopped working for me because it doesn't do any URL decoding - and my topics are called things like/wrist_camera/depth, thus becoming%2Fwrist_camera%2Fdepth.A more complete solution here would be to actually decode the URL component entirely, but this unblocked me so I figured I'd open a PR just in case nobody wanted to introduce an additional library dependency to decode a URL, which I assume would be the case.