Fix failing unit test on Windows

test_xmlrpclib was failing with "can't pickle thread.lock objects" on Windows.
Other small issues were related to backslashes in paths and different line endings.

tests/integration/test_requests.py

@@ -254,7 +254,7 @@ def test_nested_cassettes_with_session_created_before_nesting(httpbin_both, tmpd
 def test_post_file(tmpdir, httpbin_both):
     '''Ensure that we handle posting a file.'''
     url = httpbin_both + '/post'
-    with vcr.use_cassette(str(tmpdir.join('post_file.yaml'))) as cass, open('tox.ini') as f:
+    with vcr.use_cassette(str(tmpdir.join('post_file.yaml'))) as cass, open('tox.ini', 'rb') as f:
         original_response = requests.post(url, f).content
 
     # This also tests that we do the right thing with matching the body when they are files.

tests/integration/test_wild.py

@@ -81,16 +81,23 @@ def test_amazon_doctype(tmpdir):
     assert 'html' in r.text
 
 
+def start_rpc_server(q):
+    httpd = xmlrpc_server.SimpleXMLRPCServer(('127.0.0.1', 0))
+    httpd.register_function(pow)
+    q.put('http://{}:{}'.format(*httpd.server_address))
+    httpd.serve_forever()
+
+
 @pytest.yield_fixture(scope='session')
 def rpc_server():
-    httpd = xmlrpc_server.SimpleXMLRPCServer(('', 0))
-    httpd.register_function(pow)
+    q = multiprocessing.Queue()
     proxy_process = multiprocessing.Process(
-        target=httpd.serve_forever,
+        target=start_rpc_server,
+        args=(q,)
     )
     try:
         proxy_process.start()
-        yield 'http://{}:{}'.format(*httpd.server_address)
+        yield q.get()
     finally:
         proxy_process.terminate()