* the default value of URI::File's authority is "" (localhost).
Both nil and "localhost" is normalized to "" by default.
* URI::File ignores setting userinfo and port
[Feature #14035]
fix https://github.com/ruby/ruby/pull/1719
fic https://github.com/ruby/ruby/pull/1832
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62767 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
naruse