don't url-decode slash or plus in redirect URLs

[autumnull]

If amfora receives a response that looks like this:

30 gemini://example.org/some%2Fpath/to%2Ba%2Bpage/

It decodes this and tries to access the page at

gemini://example.org/some/path/to+a+page/

This is a different url to the one given in the redirect -- the / character is a path separator, but %2F is not. Amfora should not decode these characters when handling redirects.

[makew0rld]

Good point! This is often a tricky thing, but most likely just not altering URLs is the way to go. I'm not working on Amfora much at the moment, so either I'll get around to this at some point, or would accept a PR. Thanks!