rsync: added vim and Emacs modelines for consistency's sake

handlers/rsync.in

+# -*- mode: sh; sh-basic-offset: 3; indent-tabs-mode: nil; -*-
+# vim: set filetype=sh sw=3 sts=3 expandtab autoindent:
 #
 # backupninja handler for incremental backups using rsync and hardlinks
 # feedback: rhatto at riseup.net