Merge pull request #6987 from xurizaemon/CRM-17212

CRM-17212: Set session handler to "files" in extern/*php

diff --cc extern/authorizeIPN.php
Simple merge

diff --cc extern/googleNotify.php
Simple merge

diff --cc extern/ipn.php
Simple merge

diff --cc extern/rest.php
Simple merge

diff --cc extern/soap.php
Simple merge

diff --cc install/index.php
Simple merge

diff --cc tools/extensions/org.civicrm.payment.googlecheckout/googleNotify.php
Simple merge