Add 2.6.4 and 2.6.5 branches and fix fisplay of boolean test source options

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@28429 3ad0048d-3df7-0310-abae-a5850022a9f2
 Avoid error in html checker about non-encoded ampersand

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@28430 3ad0048d-3df7-0310-abae-a5850022a9f2