Add windows xp hint

Adjust readme

README.md

@@ -28,7 +28,13 @@ Windows users: NFS folders do not work on Windows hosts. Vagrant will ignore you
 
 ## Settings
 
-You can set the uid and the gid. Example:
+### Logging
+
+You activate the logging of the nfs daemon which will show the daemon window in the foreground. To activate the logging set the `config.winnfsd.logging` to `on`.
+
+### Set uid and gid
+
+You can set the uid via the `config.winnfsd.uid` param and the gid via the `config.winnfsd.gid` param. Example:
 
 ```
 Vagrant.configure('2') do |config|

lib/vagrant-winnfsd/config/winnfsd.rb

@@ -16,7 +16,7 @@ def initialize
       def validate(machine)
         errors = []
 
-        errors << 'winnfsd.logging cannot only be \'on\' or \'off\'.' if (machine.config.winnfsd.uid != 'on' || machine.config.winnfsd.uid != 'off')
+        errors << 'winnfsd.logging cannot only be \'on\' or \'off\'.' unless (machine.config.winnfsd.logging == 'on' || machine.config.winnfsd.logging == 'off')
         errors << 'winnfsd.uid cannot be nil.'                        if machine.config.winnfsd.uid.nil?
         errors << 'winnfsd.gid cannot be nil.'                        if machine.config.winnfsd.gid.nil?
 

lib/vagrant-winnfsd/plugin.rb

@@ -62,6 +62,7 @@ def self.init_plugin
         rule = "advfirewall firewall add rule name=\"%s\" dir=\"%s\" action=allow protocol=any program=\"%s\" profile=any"
         in_rule = sprintf(rule, rule_name, 'in', program)
         out_rule = sprintf(rule, rule_name, 'out', program)
+        xp_rule = "netsh firewall add allowedprogram \"#{program}\" #{rule_name} ENABLE"
 
         firewall_script = VagrantWinNFSd.get_path_for_file('setupfirewall.vbs')
         firewall_rule = "cscript //nologo #{firewall_script} \"#{cleanup_rule}\" \"#{in_rule}\" \"#{out_rule}\""
@@ -70,6 +71,8 @@ def self.init_plugin
           puts I18n.t('vagrant_winnfsd.firewall.error')
           puts "netsh #{in_rule}\n"
           puts "netsh #{out_rule}\n"
+          puts I18n.t('vagrant_winnfsd.firewall.xp_error')
+          puts xp_rule
         end
       end
     end

locales/en.yml

@@ -10,4 +10,6 @@ en:
     firewall:
       error: |-
         It seems that you don't have the privileges to change the firewall rules. NFS will not work without that firewall
-        changes. Execute the following commands as administrator:
+        changes. Execute the following commands via cmd as administrator:
+      xp_error: |-
+        If you are an Windows XP user run the following command instead: