Use selectors.DefaultSelector over select.select (neo4j#605)

select.select, while being available on many platforms has the drawback of not
being very modern. On some Linux systems, for instance, it is limited to 1024
open file descriptors. Python offers a nice wrapper to choose the best way for
each OS to poll sockets named selectors.DefaultSelector.

Backport of neo4j#604

Author: robsdedude

neo4j/io/__init__.py

@@ -40,7 +40,7 @@
 )
 from logging import getLogger
 from random import choice
-from select import select
+import selectors
 from socket import (
     AF_INET,
     AF_INET6,
@@ -1262,8 +1262,9 @@ def _handshake(s, resolved_address):
 
     # Handle the handshake response
     ready_to_read = False
-    while not ready_to_read:
-        ready_to_read, _, _ = select((s,), (), (), 1)
+    with selectors.DefaultSelector() as selector:
+        selector.register(s, selectors.EVENT_READ)
+        selector.select(1)
     try:
         data = s.recv(4)
     except OSError: