Support byte-swapped dbhash (bsddb) files.  Found by Ben Sayer.
diff --git a/Lib/whichdb.py b/Lib/whichdb.py
index 3186edf..c072e5b 100644
--- a/Lib/whichdb.py
+++ b/Lib/whichdb.py
@@ -50,7 +50,7 @@
         return "gdbm"
 
     # Check for BSD hash
-    if magic == 0x061561:
+    if magic in (0x00061561, 0x61150600):
         return "dbhash"
 
     # Unknown