threadutil: explicitly import get_ident from thread

The python module thread is the low-level module we should avoid to use in favor
of threading. We still need it to support old python because Thread.ident
doesn't exist before python 2.6:

	http://docs.python.org/library/threading.html#threading.Thread.ident

Make it clear we should avoid it.

Reviewed-by: Sebastian Spaeth <Sebastian@SSpaeth.de>
Signed-off-by: Nicolas Sebrecht <nicolas.s-dev@laposte.net>

offlineimap/threadutil.py

@@ -19,7 +19,7 @@
 from threading import Lock, Thread, BoundedSemaphore
 from Queue import Queue, Empty
 import traceback
-import thread
+from thread import get_ident	# python < 2.6 support
 import sys
 from offlineimap.ui import getglobalui
 
@@ -149,7 +149,6 @@ class ExitNotifyThread(Thread):
     exited and to provide for the ability for it to find out why."""
     def run(self):
         global exitthreads, profiledir
-        self.threadid = thread.get_ident()
         try:
             if not profiledir:          # normal case
                 Thread.run(self)
@@ -164,7 +163,7 @@ class ExitNotifyThread(Thread):
                 except SystemExit:
                     pass
                 prof.dump_stats( \
-                            profiledir + "/" + str(self.threadid) + "_" + \
+                            profiledir + "/" + str(get_ident()) + "_" + \
                             self.getName() + ".prof")
         except:
             self.setExitCause('EXCEPTION')