Add additional Random.atfork() to prevent RNG errors in large runs

Conflicts:
	paramiko/transport.py

Was: ssh 41f4566

paramiko/transport.py

@@ -1505,6 +1505,10 @@ class Transport (threading.Thread):
         # indefinitely, creating a GC cycle and not letting Transport ever be
         # GC'd. it's a bug in Thread.)
 
+        # Required to prevent RNG errors when running inside many subprocess
+        # containers.
+        Random.atfork()
+
         # Hold reference to 'sys' so we can test sys.modules to detect
         # interpreter shutdown.
         self.sys = sys