Port to Python 3.

src/allmydata/util/_python3.py

@@ -116,6 +116,7 @@ PORTED_MODULES = [
     "allmydata.util.configutil",
     "allmydata.util.connection_status",
     "allmydata.util.consumer",
+    "allmydata.util.dbutil",
     "allmydata.util.deferredutil",
     "allmydata.util.dictutil",
     "allmydata.util.eliotutil",

src/allmydata/util/dbutil.py

@@ -1,3 +1,19 @@
+"""
+SQLite3 utilities.
+
+Test coverage currently provided by test_backupdb.py.
+
+Ported to Python 3.
+"""
+
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+from __future__ import unicode_literals
+
+from future.utils import PY2
+if PY2:
+    from future.builtins import filter, map, zip, ascii, chr, hex, input, next, oct, open, pow, round, super, bytes, dict, list, object, range, str, max, min  # noqa: F401
 
 import os, sys