[ruby-cvs:73552] hsbt:r66451 (trunk): Merge RubyGems 3.0.0 from upstream.

[hsbt at ruby-lang.org]

hsbt	2018-12-19 16:20:17 +0900 (Wed, 19 Dec 2018)

  New Revision: 66451

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=66451

  Log:
    Merge RubyGems 3.0.0 from upstream.
    
      https://blog.rubygems.org/2018/12/19/3.0.0-released.html

  Modified files:
    trunk/lib/rubygems/request.rb
    trunk/lib/rubygems.rb
    trunk/test/rubygems/test_bundled_ca.rb
    trunk/test/rubygems/test_gem.rb
    trunk/test/rubygems/test_gem_commands_setup_command.rb
    trunk/test/rubygems/test_gem_remote_fetcher.rb