DNN-5743, DNN-5759, DNN-3705, DNN-5742 Support for null values in Country Code in portal settings. Submitted by sleupold.
Added localization to Redirect_AfterLogout
Add validation for SiteLogBuffer value

make sure, it is set to 1 or larger
Add validation for SiteLogBuffer value 

make sure, SiteLogBuffer is populated with a valid value
Add validation for SiteLogBuffer value 

new Validation resourcekey
Add validation for SiteLogBuffer value 

fix resource key name
CONTENT-3294 CopyFile should delete first if overwritten.
CONTENT-3197 Replace \ with / in mapped paths
Merge pull request #189 from sleupold/patch-9

DNN-6065:  Add validation for SiteLogBuffer value
Merge pull request #188 from donker/DNN-5743leupold

DNN-5743, DNN-5759, DNN-3705, DNN-5742