LazUtils: Add FollowSymLink property to TFileSearcher. Issue #24291, modified from Mario Bonati's patch

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@40848 4005530d-fff6-0310-9dd1-cebe43e6787f
Use AllFilesMask everywhere instead of GetAllFilesMask

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@40849 4005530d-fff6-0310-9dd1-cebe43e6787f