Fix for hub/test_passfd.py to allow it to run under Python 3.x; tested ok
on Python 2.7. Ran across this while trying to understand a potential
problem with passfd.c (I run FreeBSD) in conjunction with Python 3.2 that
I've not noticed before. Still haven't isolated the issue and it may lie
elsewhere.

Meanwhile:

$ hg diff test_passfd.py
diff -r a4b242b7587d hub/test_passfd.py
--- a/hub/test_passfd.py        Mon Mar 28 16:38:14 2011 -0700
+++ b/hub/test_passfd.py        Tue Mar 29 00:07:06 2011 -0700
@@ -7,6 +7,7 @@
 import os, sys, socket
 from qp.hub import passfd

+
 #
 # Create a pipe for sending the fd.
 #
@@ -28,7 +29,8 @@
         fd = fileObj.fileno()

         # Send to the child
-        os.write(wfd, "x")
+        msg = 'x'.encode('utf-8') # Python3.x requires the equivalent of
os.write(wfd, b'x')
+        os.write(wfd, msg)
         passfd.sendfd(wfd, fd)

         # Wait for child to terminate, then exit.