LONG UNC (UNCW) used by libjingle

referring to wikipedia,

"The types of paths in Windows are local file system (LFS), such as C:\File, uniform naming convention (UNC), such as \\Server\Volume\File, and Long UNC or UNCW, such as \\?\C:\File or \\?\UNC\Server\Volume\File. In earlier versions of Windows only the APIs that accept "Long UNC" were able to accept more than 260 characters."

We often use LFS in Windows, and sometimes,we use UNC to reach the share folder of LAN, Long UNC and seldomly used because the only use maybe in the earlier versions API, such as in _wfopen, to eliminate the limitation of 260 characters of filepath.

ref:

Naming a File or Directory

http://msdn.microsoft.com/en-us/library/aa365247.aspx