(url-http-target-url): Rename from url-http-cookies-sources. (url-http-parse-headers): Use it. (url-http-handle-authentication): Use subst-char-in-string.
(url-http-target-url): Rename from url-http-cookies-sources. (url-http-parse-headers): Use it. (url-http-handle-authentication): Use subst-char-in-string.