Fixed unexpected behavior of `Resolv::MDNS#each_address` when given ".local" address.

https://github.com/ruby/ruby/pull/1425

  Patch by @elct9620 [fix GH-1484]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60275 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/resolv.rb

@@ -2603,7 +2603,7 @@ class Resolv
     def each_address(name)
       name = Resolv::DNS::Name.create(name)
 
-      return unless name.to_a.last == 'local'
+      return unless name.to_a.last.to_s == 'local'
 
       super(name)
     end

test/resolv/test_mdns.rb

@@ -0,0 +1,18 @@
+# frozen_string_literal: false
+require 'test/unit'
+require 'resolv'
+
+class TestResolvMDNS < Test::Unit::TestCase
+  def setup
+  end
+
+  def test_mdns_each_address
+    mdns = Resolv::MDNS.new
+    mdns.each_resource '_http._tcp.local', Resolv::DNS::Resource::IN::PTR do |r|
+      srv = mdns.getresource r.name, Resolv::DNS::Resource::IN::SRV
+      mdns.each_address(srv.target) do |result|
+        assert_not_nil(result)
+      end
+    end
+  end
+end