Don't use "TLSv1" as a default for loopback clients/servers (#682)

* Don't use "TLSv1" as a default for loopback clients/servers

* We're sticklers for spelling
diff --git a/tests/test_ssl.py b/tests/test_ssl.py
index e154811..21e6040 100644
--- a/tests/test_ssl.py
+++ b/tests/test_ssl.py
@@ -221,13 +221,13 @@
 
 
 def loopback_client_factory(socket):
-    client = Connection(Context(TLSv1_METHOD), socket)
+    client = Connection(Context(SSLv23_METHOD), socket)
     client.set_connect_state()
     return client
 
 
 def loopback_server_factory(socket):
-    ctx = Context(TLSv1_METHOD)
+    ctx = Context(SSLv23_METHOD)
     ctx.use_privatekey(load_privatekey(FILETYPE_PEM, server_key_pem))
     ctx.use_certificate(load_certificate(FILETYPE_PEM, server_cert_pem))
     server = Connection(ctx, socket)