This checks for the equivalent WSL mount path on windows. WSL will mount
the windows drives at `/mnt/c` (or whichever drive is being used).
This is done by parsing a UNC path with forward slashes from the unix
socket URL.
Signed-off-by: Jonathan A. Sternberg <jonathan.sternberg@docker.com>
(cherry picked from commit 38c3fef1a8)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>