fix www installer: use bash

diff --git a/www/install.sh b/www/install.sh
index a8c512a..9d9f565 100755 (executable)
--- a/www/install.sh
+++ b/www/install.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 #
 # (c) Konrad Rosenbaum, 2007-2012
 # protected under the GNU AGPL version 3 or at your option any newer