IDN support: encode non-ascii domain names

lib/environment.rb

@@ -35,6 +35,7 @@ begin
   require 'nokogiri'
   require 'terminal-table'
   require 'ruby-progressbar'
+  require 'addressable/uri'
   # Custom libs
   require 'common/browser'
   require 'common/custom_option_parser'

lib/wpscan/wpscan_options.rb

@@ -55,6 +55,8 @@ class WpscanOptions
   def url=(url)
     raise  Exception.new('Empty URL given') if url.nil? || url == ''
 
+    url = Addressable::URI.parse(url).normalize.to_s unless url.ascii_only?
+
     @url = URI.parse(add_http_protocol(url)).to_s
   end