tobius/Ellipsis — comment on commit 77373168e5907ad445bb83665036c6ce3dd58b4b
File:  line 0
By daveespionage:

This allows the new bootstrap code to work on Windows when using directories created with mklink /D (linux ln -s equivalent)
The additional requirement is that the windows php version must be 5.3.4 or higher, which is supported by the most recent version of xampp.
This is due to a bug in PHP 5.3.1 and earlier where is_link would respond "false" for windows symlinks in vista and later.