'+' doesn't work in WebDAV passwords

[cyberduck]

b195aeb created the issue

I had the plus symbol (+) in my password for a WebDAV account. Logging in via the web interface was fine, but cyberduck wouldn't log in. Removing the + from my password fixed the login problem.

[cyberduck]

@dkocher commented

Changed encoding of authentication header to ISO-8859-1 which should be more compatible. In 5575259.