------------------
- Do alternate type of checking for UNIX socket support, instead of checking
for platform == windows.
- Functional tests now use multiprocessing module instead of subprocess module,
speeding up test suite and making concurrent execution more reliable.
- Runner now appends the current working directory to ``sys.path`` to support
running WSGI applications from a directory (i.e., not installed in a
virtualenv).
- Add a ``url_prefix`` adjustment setting. You can use it by passing
``script_name='/foo'`` to ``waitress.serve`` or you can use it in a
``PasteDeploy`` ini file as ``script_name = /foo``. This will cause the WSGI
``SCRIPT_NAME`` value to be the value passed minus any trailing slashes you
add, and it will cause the ``PATH_INFO`` of any request which is prefixed
with this value to be stripped of the prefix. You can use this instead of
PasteDeploy's ``prefixmiddleware`` to always prefix the path.