* lib/uri/rfc3986_parser.rb: specify a regexp for :OPAQUE; generic.rb
  assumes it is present, and will refuse all values otherwise.
  by Matthew Draper <matthew@trebex.net>
  https://github.com/ruby/ruby/pull/718 fix GH-718

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47614 b2dd03c8-39d4-4d8f-98ff-823fe69b080e