Manually merged DNS extension code (pull request 967 from @soh-cah-toa)

test/unit/tc_grep.rb

@@ -9,12 +9,12 @@ class TC_Grep < Test::Unit::TestCase
 
   def test_grep_eval
     Dir['../../**/*.rb'].each do |path|
-      File.open( path ) do |f|
+      File.open(path) do |f|
         next if /tc_grep.rb/.match(path) # skip this file
         next if /\/msf-test\//.match(path) # skip this file
         next if /extensions\/dns/.match(path) # skip this file
 
-        f.grep( /\Weval\W/im ) do |line|
+        f.grep(/\Weval\W/im) do |line|
           assert(false, "Illegal use of 'eval' in framework: " + path + ':' + line)
         end
       end