+2013-08-12 Mike Miller <mtmiller@ieee.org> (tiny change)
+
+ bootstrap: port to OpenBSD sed
+ * build-aux/bootstrap (insert_if_absent): Port to OpenBSD sed which
+ does not interpret `-' as a file argument to mean stdin.
+
2013-08-15 Eric Blake <eblake@redhat.com>
warnings: minor optimization