fixed: Some http servers provide different content when the range request header is not set causing seeking to fail. To fix this use CURL_OPT_RANGE method instead of CURLOPT_RESUME_FROM_LARGE
Merge pull request #2187 from arnova/curl_seek_fix

changed: Some (Silverlight) servers don't play nice with CURLOPT_RESUME_...
fixed: XMLUtils::GetString(.. CStdString& ..) was broken by 2d45fad482ca0384e96605761712a0a97f85a937. This caused eg. all advancedsettings defaults for strings to be cleared (eg. default players etc.)