Update tlslite to 0.4.6.

third_party/tlslite/tlslite/basedb.py

+# Authors: 
+#   Trevor Perrin
+#   Martin von Loewis - python 3 port
+#
+# See the LICENSE file for legal information regarding use of this file.
+
 """Base class for SharedKeyDB and VerifierDB."""
 
-import anydbm
-import thread
+try:
+    import anydbm
+except ImportError:
+    # Python 3
+    import dbm as anydbm
+import threading
 
-class BaseDB:
+class BaseDB(object):
     def __init__(self, filename, type):
         self.type = type
         self.filename = filename
         if self.filename:
             self.db = None
         else:
             self.db = {}
-        self.lock = thread.allocate_lock()
+        self.lock = threading.Lock()
 
     def create(self):
         """Create a new on-disk database.
 
         @raise anydbm.error: If there's a problem creating the database.
         """
         if self.filename:
             self.db = anydbm.open(self.filename, "n") #raises anydbm.error
             self.db["--Reserved--type"] = self.type
             self.db.sync()
@@ skipping 85 matching lines @@
         """
         if self.db == None:
             raise AssertionError("DB not open")
 
         self.lock.acquire()
         try:
             usernames = self.db.keys()
         finally:
             self.lock.release()
         usernames = [u for u in usernames if not u.startswith("--Reserved--")]
-        return usernames
+        return usernames