Implement verify_client_post_handshake; appveyor has TLS 1.3 now so those tests are running there.

CHANGES.rst

@@ -16,6 +16,8 @@
 
 - Improve the way joining the main thread works on Python 3.
 
+- Implement ``SSLSocket.verify_client_post_handshake()`` when available.
+
 1.5a1 (2019-05-02)
 ==================
 

src/gevent/_ssl3.py

@@ -678,6 +678,11 @@ class SSLSocket(socket):
             return None
         return self._sslobj.tls_unique_cb()
 
+    def verify_client_post_handshake(self):
+        # Only present in 3.7.1+; an attributeerror is alright
+        if self._sslobj:
+            return self._sslobj.verify_client_post_handshake()
+        raise ValueError("No SSL wrapper around " + str(self))
 
 # Python does not support forward declaration of types
 SSLContext.sslsocket_class = SSLSocket

src/gevent/tests/known_failures.py

@@ -351,6 +351,15 @@ RUN_ALONE = [
     'test__example_webproxy.py',
 ]
 
+if APPVEYOR:
+    # Strange failures sometimes, but only on Python 3.7, reporting
+    # "ConnectionAbortedError: [WinError 10053] An established
+    # connection was aborted by the software in your host machine"
+    # when we've done no such thing. Try running not in parallel
+    RUN_ALONE += [
+        'test__ssl.py',
+        'test__server.py',
+    ]
 
 
 if APPVEYOR or TRAVIS:

src/gevent/tests/test__socket.py

@@ -29,12 +29,13 @@ class Thread(_Thread):
 
     def __init__(self, **kwargs):
         target = kwargs.pop('target')
+        caller = getcurrent()
         @wraps(target)
         def errors_are_fatal(*args, **kwargs):
             try:
                 return target(*args, **kwargs)
             except: # pylint:disable=bare-except
-                getcurrent().parent.throw(*sys.exc_info())
+                caller.throw(*sys.exc_info())
 
         _Thread.__init__(self, target=errors_are_fatal, **kwargs)
         self.start()