mod_session: When we have a session we were unable to decode, behave as if...

mod_session: When we have a session we were unable to decode, behave as if there was no session at all.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1560977 13f79535-47bb-0310-9956-ffa450edef68