resolv.rb: case-insensitive comparison
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49073 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
resolv.rb: case-insensitive comparison
comparison should be case-insensitive as well.
[ruby-core:66498] [Bug #10550]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49073 b2dd03c8-39d4-4d8f-98ff-823fe69b080e