url-http: Fix handling of redirect locations

url-http: Fix handling of redirect locations

* lisp/url/url-http.el (url-http-parse-headers): Parse redirect
URIs more like other web browsers (bug#42382).

RFC 7231 the Location header is defined to carry a URI-reference.
According to RFC 3986 it should be percent-encoded and thus should not
contain spaces. However, there are HTTP server implementation (notably
nginx) that do not do that. This makes Emacs url-http.el behave like
most other HTTP client implementatios. Also remove the stripping of
angle bracket quotes as they are not valid according to the RFCs.

Copyright-paperwork-exempt: yes