Item12475: partly reverting, putting CGI::Session back to the core as bin/configure relies on it

git-svn-id: http://svn.foswiki.org/trunk@17331 0b4bb1d4-4e5a-0410-9cc4-b2b747904278
Item12475: Moving most of the CPAN deps from core to CpanContrib. Simplifying INC.

git-svn-id: http://svn.foswiki.org/trunk@17332 0b4bb1d4-4e5a-0410-9cc4-b2b747904278