redistributed according to the separate (BSD-style) license written
inside those files.
-The files in lib/tornado are covered by the license described in
-lib/tornado/README.
-
The definition of the relpath function was taken from CPython (tag
v2.6, file Lib/posixpath.py, hg-commit 95fff5a6a276) and is covered
under the terms of the PYTHON SOFTWARE FOUNDATION LICENSE VERSION 2.