Merge branch 'stable-3.1' into 'stable-3.1'

Till Brehm

2016-05-19 9d3f20bb3ef7391c94eae54ddf3750bcc181678e

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<tmpl_dyninclude name="content_tpl">
<input type="hidden" name="_csrf_id" value="{tmpl_var name='_csrf_id'}" />
<input type="hidden" name="_csrf_key" value="{tmpl_var name='_csrf_key'}" />