Client cacheheaders will now always be set to half an hour expiration. 



git-svn-id: https://svn.muze.nl/svn/ariadne-php5/branches/2.7-fixes@5612 7882d7ee-46e0-0310-a255-a28a61b628e4
accept timeouts smaller than half an hour


git-svn-id: https://svn.muze.nl/svn/ariadne-php5/branches/2.7-fixes@5613 7882d7ee-46e0-0310-a255-a28a61b628e4