embedded-files: more descriptive on the "freifunk-mod" rendering issue

* be more descriptive on the issue by referencing the issue (freifunk/openwrt-packages#24)
* link to some resources that can normally accessed via the pages of this mod

relates to freifunk-berlin#808 also

embedded-files/www/luci-static/index_user.html

@@ -1 +1,5 @@
-As the package "luci-mod-freifunk" / "luci-mod-freifunk" is broken, you can <a href='/cgi-bin/luci/admin/status/overview'>reach the admin interface via this link</a>.
+As the package luci-mod-freifunk" / "luci-mod-freifunk" is <a href'https://github.com/freifunk/openwrt-packages/issues/24'>broken</a>, you can access the:<br>
+<ul>
+<li><a href='/cgi-bin-status.html'>OLSR status page</a></li>
+<li><a href='/cgi-bin/luci/admin/status/overview'>admin interface</a></li>
+</ul>