+# (<0.23) setup to the new (>=0.23) setup.
+
+# You should be able to run this script after any version >= 0.23 is
+# installed. This script should be well-behaved, even if it is run
+# repeatedly.
+
+# Written by
+# Jameson Rollins <jrollins@finestructure.net>
+# Daniel Kahn Gillmor <dkg@fifthhorseman.net>
+#
+# Copyright 2009, released under the GPL, version 3 or later
+
+# NOTE: the reverse operation (downgrading) is not directly supported,
+# and MAY LOCK YOU OUT OF YOUR SYSTEM, depending on how you have
+# configured the monkeysphere!
+
+# any unexpected errors should cause this script to bail:
+set -e