- pybsddb Bug #1527939: bsddb module DBEnv dbremove and dbrename
  methods now allow their database parameter to be None as the
  sleepycat API allows.

Also adds an appropriate test case for DBEnv.dbrename and dbremove.
diff --git a/Lib/bsddb/test/test_basics.py b/Lib/bsddb/test/test_basics.py
index 0ae8732..25e0b6b 100644
--- a/Lib/bsddb/test/test_basics.py
+++ b/Lib/bsddb/test/test_basics.py
@@ -562,6 +562,9 @@
         num = d.truncate()
         assert num == 0, "truncate on empty DB returned nonzero (%r)" % (num,)
 
+    #----------------------------------------
+
+
 #----------------------------------------------------------------------
 
 
@@ -583,18 +586,40 @@
     dbopenflags = db.DB_THREAD
 
 
-class BasicBTreeWithEnvTestCase(BasicTestCase):
+class BasicWithEnvTestCase(BasicTestCase):
+    dbopenflags = db.DB_THREAD
+    useEnv = 1
+    envflags = db.DB_THREAD | db.DB_INIT_MPOOL | db.DB_INIT_LOCK
+
+    #----------------------------------------
+
+    def test07_EnvRemoveAndRename(self):
+        if not self.env:
+            return
+
+        if verbose:
+            print '\n', '-=' * 30
+            print "Running %s.test07_EnvRemoveAndRename..." % self.__class__.__name__
+
+        # can't rename or remove an open DB
+        self.d.close()
+
+        newname = self.filename + '.renamed'
+        self.env.dbrename(self.filename, None, newname)
+        self.env.dbremove(newname)
+
+    # dbremove and dbrename are in 4.1 and later
+    if db.version() < (4,1):
+        del test07_EnvRemoveAndRename
+
+    #----------------------------------------
+
+class BasicBTreeWithEnvTestCase(BasicWithEnvTestCase):
     dbtype = db.DB_BTREE
-    dbopenflags = db.DB_THREAD
-    useEnv = 1
-    envflags = db.DB_THREAD | db.DB_INIT_MPOOL | db.DB_INIT_LOCK
 
 
-class BasicHashWithEnvTestCase(BasicTestCase):
+class BasicHashWithEnvTestCase(BasicWithEnvTestCase):
     dbtype = db.DB_HASH
-    dbopenflags = db.DB_THREAD
-    useEnv = 1
-    envflags = db.DB_THREAD | db.DB_INIT_MPOOL | db.DB_INIT_LOCK
 
 
 #----------------------------------------------------------------------
diff --git a/Misc/NEWS b/Misc/NEWS
index 294b159..663203b 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -128,6 +128,10 @@
 - Because of a misspelled preprocessor symbol, ctypes was always
   compiled without thread support; this is now fixed.
 
+- pybsddb Bug #1527939: bsddb module DBEnv dbremove and dbrename
+  methods now allow their database parameter to be None as the
+  sleepycat API allows.
+
 Tests
 -----
 
diff --git a/Modules/_bsddb.c b/Modules/_bsddb.c
index 9e302bc..b39e6f2 100644
--- a/Modules/_bsddb.c
+++ b/Modules/_bsddb.c
@@ -98,7 +98,7 @@
 #error "eek! DBVER can't handle minor versions > 9"
 #endif
 
-#define PY_BSDDB_VERSION "4.4.4"
+#define PY_BSDDB_VERSION "4.4.5"
 static char *rcs_id = "$Id$";
 
 
@@ -3876,7 +3876,7 @@
     static char* kwnames[] = { "file", "database", "txn", "flags",
                                      NULL };
 
-    if (!PyArg_ParseTupleAndKeywords(args, kwargs, "ss|Oi:dbremove", kwnames,
+    if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s|zOi:dbremove", kwnames,
 		&file, &database, &txnobj, &flags)) {
 	return NULL;
     }
@@ -3904,7 +3904,7 @@
     static char* kwnames[] = { "file", "database", "newname", "txn",
                                      "flags", NULL };
 
-    if (!PyArg_ParseTupleAndKeywords(args, kwargs, "sss|Oi:dbrename", kwnames,
+    if (!PyArg_ParseTupleAndKeywords(args, kwargs, "szs|Oi:dbrename", kwnames,
 		&file, &database, &newname, &txnobj, &flags)) {
 	return NULL;
     }